Chromatography (/ˌkroʊməˈtɒɡrəfi/; from Greek χρῶμα chroma which means "color" and γράφειν graphein "to write") is the collective term for a set of laboratory techniques for the separation of mixtures.
The mixture is dissolved in a fluid called the mobile phase, which carries it through a structure holding another material called the stationary phase. The various constituents of the mixture travel at different speeds, causing them to separate. The separation is based on differential partitioning between the mobile and stationary phases. Subtle differences in a compound's partition coefficient result in differential retention on the stationary phase and thus changing the separation.
Chromatography may be preparative or analytical. The purpose of preparative chromatography is to separate the components of a mixture for more advanced use (and is thus a form of purification). Analytical chromatography is done normally with smaller amounts of material and is for measuring the relative proportions of analytes in a mixture. The two are not mutually exclusive.
In chemistry, hydrophobicity is the physical property of a molecule (known as a hydrophobe) that is seemingly repelled from a mass of water. (Strictly speaking, there is no repulsive force involved; it is an absence of attraction.)
Hydrophobic molecules tend to be non-polar and, thus, prefer other neutral molecules and non-polar solvents. Hydrophobic molecules in water often cluster together, forming micelles. Water on hydrophobic surfaces will exhibit a high contact angle.
Examples of hydrophobic molecules include the alkanes, oils, fats, and greasy substances in general. Hydrophobic materials are used for oil removal from water, the management of oil spills, and chemical separation processes to remove non-polar substances from polar compounds.
Hydrophobic is often used interchangeably with lipophilic, "fat-loving." However, the two terms are not synonymous. While hydrophobic substances are usually lipophilic, there are exceptions—such as the silicones and fluorocarbons.
The term hydrophobe comes from the Ancient Greek ὑδρόφοβος, "having a horror of water", constructed from ὕδωρ, "water", and φόβος, "fear".
Basics of chromatography | Chemical processes | MCAT | Khan Academy
Understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exchange, ion exchange, affinity, HPLC, and. By Angela Guerrero. . Created by Angela Guerrero.
Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/thin-layer-chromatography?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/extractions?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
MCAT on Khan Academy: Go ahead and practice some passage-based questions!
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their ...
Our topic for today is Chromatography.
Does black ink consist of only black color or any other color as well?
Let us find out by the process of paper chromatography.
Chromatography is a technique of separating two or more dissolved solids which are present in a solution in very small quantities.
Take a strip of filter paper.
Draw a line with a pencil close to the lower edge of the paper.
Put a small drop of ink on the center of the line.
Let it dry for sometime.
Take a jar containing some water.
Put the filter paper in it such that the drop of ink is just above the water level.
After sometime, the water starts gradually rising up by capillary action.
As the water moves up, it takes the dyes present in the ink along with it.
Slowly, we start seeing some different colors on the paper as the ...
published: 21 Jan 2016
GCSE Chemistry - Paper Chromatography #63
In this video you'll learn:
- What chromatography is used for
- The process for setting up and carrying out paper chromatography
- What the mobile and stationary phases are
published: 05 May 2019
🧪Paper Chromatography - Chemistry Experiment with Mr Pauller
This video shows a paper chromatography experiment conducted to separate the different pigments present in a wet erase marker.
SUBSCRIBE: https://tinyurl.com/y29j7ruq
Other Chromatography Experiments:
Water vs. Alcohol Paper Chromatography - https://youtu.be/9GxYUNVqXSg
Radial Chromatography - https://youtu.be/9--wGHiSPfM
Other Experiments:
Burning Magnesium & Chemical Reactions - https://goo.gl/vLz3zu
Copper and Silver Nitrate Reaction - https://goo.gl/3X1YgN
Enzymes in Your Spit, Salivary Amylase - https://goo.gl/TcLm2B
Solubility of a Gas in a Liquid (Messy!) - https://goo.gl/ZqYkje
Osmosis in Red Onion Cells - https://goo.gl/FhVwKR
Egg Osmosis Experiment - https://goo.gl/r2LEyH
Firework Chemistry, Flame Tests! - https://goo.gl/4DEUtW
Cabbage Juice pH Indicator Lab - https://goo.gl...
published: 30 Apr 2014
Chromatography - GCSE Science Required Practical
Mrs Peers-Dent shows you how to separate substances using chromatography and measure Rf values.
Leave a like if you found this helpful!
-------------------------------------
00:00 Preparing experiment
06:33 Analysing results
07:57 Calculating Rf value
published: 21 Jul 2016
Chromatography
The term chromato means colour and graphy means to write. Chromatography technique is widely used for the separation of molecules from a mixture. Chromatography separation is based on the difference in solubility of sample molecules in the mobile phase and the stationary phase. The mobile phase is also known as Eluent. The mobile phase leaving the column is called eluate and the sample leaving the column is called eluite.
published: 19 Jun 2019
Chromatography Types | gas chromatography, liquid chromatography, HPLC, paper chromatography
Chromatography Types - This lecture explains about different types of chromatography including gas chromatography, liquid chromatography such as size exclusion chromatography, affinity chromatography, ion exchange chromatography techniques.
For more information, log on to-
http://www.shomusbiology.com/
Get Shomu's Biology DVD set here-
http://www.shomusbiology.com/dvd-store/
Download the study materials here-
http://shomusbiology.com/bio-materials.html
Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the followin...
published: 18 Jan 2016
Paper & Thin Layer Chromatography | Chemical Tests | Chemistry | FuseSchool
Paper & Thin Layer Chromatography | Chemical Tests | Chemistry | FuseSchool
Learn the basics about Paper and Thin Layer Chromatography. What is Chromatography and why is it done? Find out more in this video!
SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT.
VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you.
These videos can be used in a flipped classroom model or as a revision aid.
Find all of our Chemistry videos he...
Understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exchange, ion exchange, affinity, HPLC, and. By Angela Gue...
Understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exchange, ion exchange, affinity, HPLC, and. By Angela Guerrero. . Created by Angela Guerrero.
Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/thin-layer-chromatography?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/extractions?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
MCAT on Khan Academy: Go ahead and practice some passage-based questions!
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Understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exchange, ion exchange, affinity, HPLC, and. By Angela Guerrero. . Created by Angela Guerrero.
Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/thin-layer-chromatography?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/extractions?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
MCAT on Khan Academy: Go ahead and practice some passage-based questions!
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
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Our topic for today is Chromatography.
Does black ink consist of only black color or any other color as well?
Let us find out by the process of paper chromatogr...
Our topic for today is Chromatography.
Does black ink consist of only black color or any other color as well?
Let us find out by the process of paper chromatography.
Chromatography is a technique of separating two or more dissolved solids which are present in a solution in very small quantities.
Take a strip of filter paper.
Draw a line with a pencil close to the lower edge of the paper.
Put a small drop of ink on the center of the line.
Let it dry for sometime.
Take a jar containing some water.
Put the filter paper in it such that the drop of ink is just above the water level.
After sometime, the water starts gradually rising up by capillary action.
As the water moves up, it takes the dyes present in the ink along with it.
Slowly, we start seeing some different colors on the paper as the water rises up, these are the different dyes present in the ink.
Different dyes have different solubility levels and travel at different speeds as the water rises up.
As a result, we see different colors at different heights and the dyes get separated.
Hence, in this way paper chromatography is used to separate the different colors in a dye.
Our topic for today is Chromatography.
Does black ink consist of only black color or any other color as well?
Let us find out by the process of paper chromatography.
Chromatography is a technique of separating two or more dissolved solids which are present in a solution in very small quantities.
Take a strip of filter paper.
Draw a line with a pencil close to the lower edge of the paper.
Put a small drop of ink on the center of the line.
Let it dry for sometime.
Take a jar containing some water.
Put the filter paper in it such that the drop of ink is just above the water level.
After sometime, the water starts gradually rising up by capillary action.
As the water moves up, it takes the dyes present in the ink along with it.
Slowly, we start seeing some different colors on the paper as the water rises up, these are the different dyes present in the ink.
Different dyes have different solubility levels and travel at different speeds as the water rises up.
As a result, we see different colors at different heights and the dyes get separated.
Hence, in this way paper chromatography is used to separate the different colors in a dye.
In this video you'll learn:
- What chromatography is used for
- The process for setting up and carrying out paper chromatography
- What the mobile and stationar...
In this video you'll learn:
- What chromatography is used for
- The process for setting up and carrying out paper chromatography
- What the mobile and stationary phases are
In this video you'll learn:
- What chromatography is used for
- The process for setting up and carrying out paper chromatography
- What the mobile and stationary phases are
This video shows a paper chromatography experiment conducted to separate the different pigments present in a wet erase marker.
SUBSCRIBE: https://tinyurl.com/...
This video shows a paper chromatography experiment conducted to separate the different pigments present in a wet erase marker.
SUBSCRIBE: https://tinyurl.com/y29j7ruq
Other Chromatography Experiments:
Water vs. Alcohol Paper Chromatography - https://youtu.be/9GxYUNVqXSg
Radial Chromatography - https://youtu.be/9--wGHiSPfM
Other Experiments:
Burning Magnesium & Chemical Reactions - https://goo.gl/vLz3zu
Copper and Silver Nitrate Reaction - https://goo.gl/3X1YgN
Enzymes in Your Spit, Salivary Amylase - https://goo.gl/TcLm2B
Solubility of a Gas in a Liquid (Messy!) - https://goo.gl/ZqYkje
Osmosis in Red Onion Cells - https://goo.gl/FhVwKR
Egg Osmosis Experiment - https://goo.gl/r2LEyH
Firework Chemistry, Flame Tests! - https://goo.gl/4DEUtW
Cabbage Juice pH Indicator Lab - https://goo.gl/9kCiyZ
Chemical and Physical Changes Lab - https://goo.gl/iCztn3
#mrpauller
#ScienceExperiments
This video shows a paper chromatography experiment conducted to separate the different pigments present in a wet erase marker.
SUBSCRIBE: https://tinyurl.com/y29j7ruq
Other Chromatography Experiments:
Water vs. Alcohol Paper Chromatography - https://youtu.be/9GxYUNVqXSg
Radial Chromatography - https://youtu.be/9--wGHiSPfM
Other Experiments:
Burning Magnesium & Chemical Reactions - https://goo.gl/vLz3zu
Copper and Silver Nitrate Reaction - https://goo.gl/3X1YgN
Enzymes in Your Spit, Salivary Amylase - https://goo.gl/TcLm2B
Solubility of a Gas in a Liquid (Messy!) - https://goo.gl/ZqYkje
Osmosis in Red Onion Cells - https://goo.gl/FhVwKR
Egg Osmosis Experiment - https://goo.gl/r2LEyH
Firework Chemistry, Flame Tests! - https://goo.gl/4DEUtW
Cabbage Juice pH Indicator Lab - https://goo.gl/9kCiyZ
Chemical and Physical Changes Lab - https://goo.gl/iCztn3
#mrpauller
#ScienceExperiments
Mrs Peers-Dent shows you how to separate substances using chromatography and measure Rf values.
Leave a like if you found this helpful!
------------------------...
Mrs Peers-Dent shows you how to separate substances using chromatography and measure Rf values.
Leave a like if you found this helpful!
-------------------------------------
00:00 Preparing experiment
06:33 Analysing results
07:57 Calculating Rf value
Mrs Peers-Dent shows you how to separate substances using chromatography and measure Rf values.
Leave a like if you found this helpful!
-------------------------------------
00:00 Preparing experiment
06:33 Analysing results
07:57 Calculating Rf value
The term chromato means colour and graphy means to write. Chromatography technique is widely used for the separation of molecules from a mixture. Chromatography...
The term chromato means colour and graphy means to write. Chromatography technique is widely used for the separation of molecules from a mixture. Chromatography separation is based on the difference in solubility of sample molecules in the mobile phase and the stationary phase. The mobile phase is also known as Eluent. The mobile phase leaving the column is called eluate and the sample leaving the column is called eluite.
The term chromato means colour and graphy means to write. Chromatography technique is widely used for the separation of molecules from a mixture. Chromatography separation is based on the difference in solubility of sample molecules in the mobile phase and the stationary phase. The mobile phase is also known as Eluent. The mobile phase leaving the column is called eluate and the sample leaving the column is called eluite.
Chromatography Types - This lecture explains about different types of chromatography including gas chromatography, liquid chromatography such as size exclusion ...
Chromatography Types - This lecture explains about different types of chromatography including gas chromatography, liquid chromatography such as size exclusion chromatography, affinity chromatography, ion exchange chromatography techniques.
For more information, log on to-
http://www.shomusbiology.com/
Get Shomu's Biology DVD set here-
http://www.shomusbiology.com/dvd-store/
Download the study materials here-
http://shomusbiology.com/bio-materials.html
Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology-
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Thank you for watching
Chromatography Types - This lecture explains about different types of chromatography including gas chromatography, liquid chromatography such as size exclusion chromatography, affinity chromatography, ion exchange chromatography techniques.
For more information, log on to-
http://www.shomusbiology.com/
Get Shomu's Biology DVD set here-
http://www.shomusbiology.com/dvd-store/
Download the study materials here-
http://shomusbiology.com/bio-materials.html
Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology-
Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store
Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help
Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching
We are social. Find us on different sites here-
Our Website – www.shomusbiology.com
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Thank you for watching
Paper & Thin Layer Chromatography | Chemical Tests | Chemistry | FuseSchool
Learn the basics about Paper and Thin Layer Chromatography. What is Chromatography ...
Paper & Thin Layer Chromatography | Chemical Tests | Chemistry | FuseSchool
Learn the basics about Paper and Thin Layer Chromatography. What is Chromatography and why is it done? Find out more in this video!
SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT.
VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you.
These videos can be used in a flipped classroom model or as a revision aid.
Find all of our Chemistry videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlReKGMVfUt6YuNQsO0bqSMV
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Paper & Thin Layer Chromatography | Chemical Tests | Chemistry | FuseSchool
Learn the basics about Paper and Thin Layer Chromatography. What is Chromatography and why is it done? Find out more in this video!
SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT.
VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you.
These videos can be used in a flipped classroom model or as a revision aid.
Find all of our Chemistry videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlReKGMVfUt6YuNQsO0bqSMV
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The Hydrophobic Effect and Entropy Biochemistry MADE SUPER SIMPLE!
published: 09 Apr 2019
The Difference Between Hydrophilic and Hydrophobic
Keep watching to see us test out the difference between Hydrophilic and Hydrophobic!
Visit us online: https://www.bisco.com/
#dental #dentistry #dentist #teeth
published: 06 Aug 2015
Hydrophobic Feathers
Source: https://www.instagram.com/icelandiceider/
Song:
Flow by Nomyn / nomyn
Creative Commons — Attribution 3.0 Unported — CC BY 3.0
Free Download / Stream: http://bit.ly/-_flow
Music promoted by Audio Library • Flow – Nomyn (No Copyright Music)
#shorts
published: 16 Sep 2024
Gecko skin is hydrophobic
published: 19 Dec 2023
Ultra ever Dry Europe TAP - Hydrophobe - TAP France - Protection
Pour vous procurer Ultra Ever Dry en Europe : www.ultraeverdry-tap.com
Pour tester le produit, Tap France (distributeur officiel des produits Ultratech pour l'Europe) propose un kit découverte permettant de traiter une surface d'environ 2 m² :
www.tap-shop.fr/kit-decouverte-ultra-ever-dry.html
Nouvelle vidéo montrant les incroyables performances de l'hydrophobe Ultra Ever Dry.
Le produit est testé sur du papier, tissu, vêtement, chaussures.
Vous verrez dans cette vidéo l'efficacité en terme d'imperméabilité sur un réveil électronique plongé dans l'eau...!
published: 25 Feb 2014
How To Make Your Hands Hydrophobic! (Water Repellent)
Learn how to easily create a powder that repels water when applied to your skin!
Subscribe and watch more dope videos: https://bit.ly/sub2packer
published: 13 May 2022
This Is The Opposite of Hydrophobic—Superhydrophilic
In this video I use 3Ms Super-Hydrophilic Post-it Flex Write Surface to see what properties superhydrophilic materials have, compared to hydrophobic
Shop the Action Lab Science Gear here: https://theactionlab.com/
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published: 17 Feb 2024
Hydrophile et hydrophobe — expérience scientifique #6.05 de Grains de bâtisseurs
Avec les expériences scientifiques « Grains de Bâtisseurs » découvrez le comportement étrange des constituants de la terre (sable, eau, argile) et vous allez comprendre comment et pourquoi il est possible de construire en terre crue. 👇
---------
[ Expérience 6.05] Hydrophile et hydrophobe
L’eau mouille. C’est une évidence, pourtant ce n’est pas aussi systématique qu’on le croit. Certaines surfaces solides repoussent l’eau à tel point qu’elles restent sèches après avoir été trempée dans l’eau. On dit que ce sont des surfaces hydrophobes. A l’inverse, une surface qui attire l’eau est dite hydrophile.
Lorsqu’on pose une goutte d’eau sur du verre très propre, on la voit s’étaler complètement : le verre est hydrophile. Sur une plaque de plexiglas, l’eau reste rassemblée en gouttes arrondies :...
Keep watching to see us test out the difference between Hydrophilic and Hydrophobic!
Visit us online: https://www.bisco.com/
#dental #dentistry #dentist #teeth...
Keep watching to see us test out the difference between Hydrophilic and Hydrophobic!
Visit us online: https://www.bisco.com/
#dental #dentistry #dentist #teeth
Keep watching to see us test out the difference between Hydrophilic and Hydrophobic!
Visit us online: https://www.bisco.com/
#dental #dentistry #dentist #teeth
Pour vous procurer Ultra Ever Dry en Europe : www.ultraeverdry-tap.com
Pour tester le produit, Tap France (distributeur officiel des produits Ultratech pour l'E...
Pour vous procurer Ultra Ever Dry en Europe : www.ultraeverdry-tap.com
Pour tester le produit, Tap France (distributeur officiel des produits Ultratech pour l'Europe) propose un kit découverte permettant de traiter une surface d'environ 2 m² :
www.tap-shop.fr/kit-decouverte-ultra-ever-dry.html
Nouvelle vidéo montrant les incroyables performances de l'hydrophobe Ultra Ever Dry.
Le produit est testé sur du papier, tissu, vêtement, chaussures.
Vous verrez dans cette vidéo l'efficacité en terme d'imperméabilité sur un réveil électronique plongé dans l'eau...!
Pour vous procurer Ultra Ever Dry en Europe : www.ultraeverdry-tap.com
Pour tester le produit, Tap France (distributeur officiel des produits Ultratech pour l'Europe) propose un kit découverte permettant de traiter une surface d'environ 2 m² :
www.tap-shop.fr/kit-decouverte-ultra-ever-dry.html
Nouvelle vidéo montrant les incroyables performances de l'hydrophobe Ultra Ever Dry.
Le produit est testé sur du papier, tissu, vêtement, chaussures.
Vous verrez dans cette vidéo l'efficacité en terme d'imperméabilité sur un réveil électronique plongé dans l'eau...!
In this video I use 3Ms Super-Hydrophilic Post-it Flex Write Surface to see what properties superhydrophilic materials have, compared to hydrophobic
Shop the A...
In this video I use 3Ms Super-Hydrophilic Post-it Flex Write Surface to see what properties superhydrophilic materials have, compared to hydrophobic
Shop the Action Lab Science Gear here: https://theactionlab.com/
Checkout my experiment book: https://amzn.to/2Wf07x1
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In this video I use 3Ms Super-Hydrophilic Post-it Flex Write Surface to see what properties superhydrophilic materials have, compared to hydrophobic
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Avec les expériences scientifiques « Grains de Bâtisseurs » découvrez le comportement étrange des constituants de la terre (sable, eau, argile) et vous allez co...
Avec les expériences scientifiques « Grains de Bâtisseurs » découvrez le comportement étrange des constituants de la terre (sable, eau, argile) et vous allez comprendre comment et pourquoi il est possible de construire en terre crue. 👇
---------
[ Expérience 6.05] Hydrophile et hydrophobe
L’eau mouille. C’est une évidence, pourtant ce n’est pas aussi systématique qu’on le croit. Certaines surfaces solides repoussent l’eau à tel point qu’elles restent sèches après avoir été trempée dans l’eau. On dit que ce sont des surfaces hydrophobes. A l’inverse, une surface qui attire l’eau est dite hydrophile.
Lorsqu’on pose une goutte d’eau sur du verre très propre, on la voit s’étaler complètement : le verre est hydrophile. Sur une plaque de plexiglas, l’eau reste rassemblée en gouttes arrondies : le plexiglas est moins hydrophile que le verre. Enfin sur une surface fluorisée, l’eau forme des perles d’eau, elle est complètement repoussée par le support : c’est une surface hydrophobe.
——————
Les ateliers "Grains de Bâtisseurs" sont de petites expériences scientifiques simples pour découvrir comment il est possible de passer d'un tas de terre à un mur puis à des édifices capables de durer des siècles et de résister aux intempéries. Entrez avec émerveillement au coeur de la matière en grains et de ses comportements étonnants. Laissez-vous guider, de la géologie à l'architecture, vers la découverte du comportement étrange des constituants de la terre : le sable, l'eau et l'argile. Pour en savoir plus sur la construction en terre crue: http://craterre.org/
#ExpérienceScientifique #TerreCrue #construction
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Avec les expériences scientifiques « Grains de Bâtisseurs » découvrez le comportement étrange des constituants de la terre (sable, eau, argile) et vous allez comprendre comment et pourquoi il est possible de construire en terre crue. 👇
---------
[ Expérience 6.05] Hydrophile et hydrophobe
L’eau mouille. C’est une évidence, pourtant ce n’est pas aussi systématique qu’on le croit. Certaines surfaces solides repoussent l’eau à tel point qu’elles restent sèches après avoir été trempée dans l’eau. On dit que ce sont des surfaces hydrophobes. A l’inverse, une surface qui attire l’eau est dite hydrophile.
Lorsqu’on pose une goutte d’eau sur du verre très propre, on la voit s’étaler complètement : le verre est hydrophile. Sur une plaque de plexiglas, l’eau reste rassemblée en gouttes arrondies : le plexiglas est moins hydrophile que le verre. Enfin sur une surface fluorisée, l’eau forme des perles d’eau, elle est complètement repoussée par le support : c’est une surface hydrophobe.
——————
Les ateliers "Grains de Bâtisseurs" sont de petites expériences scientifiques simples pour découvrir comment il est possible de passer d'un tas de terre à un mur puis à des édifices capables de durer des siècles et de résister aux intempéries. Entrez avec émerveillement au coeur de la matière en grains et de ses comportements étonnants. Laissez-vous guider, de la géologie à l'architecture, vers la découverte du comportement étrange des constituants de la terre : le sable, l'eau et l'argile. Pour en savoir plus sur la construction en terre crue: http://craterre.org/
#ExpérienceScientifique #TerreCrue #construction
Licence Creative Commons : BY + NC + ND
Co-production : CRAterre-ENSAG, amàco, les films du lierre
——————
ABONNEZ-VOUS
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Understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exchange, ion exchange, affinity, HPLC, and. By Angela Guerrero. . Created by Angela Guerrero.
Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/thin-layer-chromatography?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/extractions?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
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Our topic for today is Chromatography.
Does black ink consist of only black color or any other color as well?
Let us find out by the process of paper chromatography.
Chromatography is a technique of separating two or more dissolved solids which are present in a solution in very small quantities.
Take a strip of filter paper.
Draw a line with a pencil close to the lower edge of the paper.
Put a small drop of ink on the center of the line.
Let it dry for sometime.
Take a jar containing some water.
Put the filter paper in it such that the drop of ink is just above the water level.
After sometime, the water starts gradually rising up by capillary action.
As the water moves up, it takes the dyes present in the ink along with it.
Slowly, we start seeing some different colors on the paper as the water rises up, these are the different dyes present in the ink.
Different dyes have different solubility levels and travel at different speeds as the water rises up.
As a result, we see different colors at different heights and the dyes get separated.
Hence, in this way paper chromatography is used to separate the different colors in a dye.
In this video you'll learn:
- What chromatography is used for
- The process for setting up and carrying out paper chromatography
- What the mobile and stationary phases are
This video shows a paper chromatography experiment conducted to separate the different pigments present in a wet erase marker.
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Other Chromatography Experiments:
Water vs. Alcohol Paper Chromatography - https://youtu.be/9GxYUNVqXSg
Radial Chromatography - https://youtu.be/9--wGHiSPfM
Other Experiments:
Burning Magnesium & Chemical Reactions - https://goo.gl/vLz3zu
Copper and Silver Nitrate Reaction - https://goo.gl/3X1YgN
Enzymes in Your Spit, Salivary Amylase - https://goo.gl/TcLm2B
Solubility of a Gas in a Liquid (Messy!) - https://goo.gl/ZqYkje
Osmosis in Red Onion Cells - https://goo.gl/FhVwKR
Egg Osmosis Experiment - https://goo.gl/r2LEyH
Firework Chemistry, Flame Tests! - https://goo.gl/4DEUtW
Cabbage Juice pH Indicator Lab - https://goo.gl/9kCiyZ
Chemical and Physical Changes Lab - https://goo.gl/iCztn3
#mrpauller
#ScienceExperiments
Mrs Peers-Dent shows you how to separate substances using chromatography and measure Rf values.
Leave a like if you found this helpful!
-------------------------------------
00:00 Preparing experiment
06:33 Analysing results
07:57 Calculating Rf value
The term chromato means colour and graphy means to write. Chromatography technique is widely used for the separation of molecules from a mixture. Chromatography separation is based on the difference in solubility of sample molecules in the mobile phase and the stationary phase. The mobile phase is also known as Eluent. The mobile phase leaving the column is called eluate and the sample leaving the column is called eluite.
Chromatography Types - This lecture explains about different types of chromatography including gas chromatography, liquid chromatography such as size exclusion chromatography, affinity chromatography, ion exchange chromatography techniques.
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Paper & Thin Layer Chromatography | Chemical Tests | Chemistry | FuseSchool
Learn the basics about Paper and Thin Layer Chromatography. What is Chromatography and why is it done? Find out more in this video!
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Chromatography (/ˌkroʊməˈtɒɡrəfi/; from Greek χρῶμα chroma which means "color" and γράφειν graphein "to write") is the collective term for a set of laboratory techniques for the separation of mixtures.
The mixture is dissolved in a fluid called the mobile phase, which carries it through a structure holding another material called the stationary phase. The various constituents of the mixture travel at different speeds, causing them to separate. The separation is based on differential partitioning between the mobile and stationary phases. Subtle differences in a compound's partition coefficient result in differential retention on the stationary phase and thus changing the separation.
Chromatography may be preparative or analytical. The purpose of preparative chromatography is to separate the components of a mixture for more advanced use (and is thus a form of purification). Analytical chromatography is done normally with smaller amounts of material and is for measuring the relative proportions of analytes in a mixture. The two are not mutually exclusive.
Keep watching to see us test out the difference between Hydrophilic and Hydrophobic!
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Pour vous procurer Ultra Ever Dry en Europe : www.ultraeverdry-tap.com
Pour tester le produit, Tap France (distributeur officiel des produits Ultratech pour l'Europe) propose un kit découverte permettant de traiter une surface d'environ 2 m² :
www.tap-shop.fr/kit-decouverte-ultra-ever-dry.html
Nouvelle vidéo montrant les incroyables performances de l'hydrophobe Ultra Ever Dry.
Le produit est testé sur du papier, tissu, vêtement, chaussures.
Vous verrez dans cette vidéo l'efficacité en terme d'imperméabilité sur un réveil électronique plongé dans l'eau...!
In this video I use 3Ms Super-Hydrophilic Post-it Flex Write Surface to see what properties superhydrophilic materials have, compared to hydrophobic
Shop the Action Lab Science Gear here: https://theactionlab.com/
Checkout my experiment book: https://amzn.to/2Wf07x1
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Avec les expériences scientifiques « Grains de Bâtisseurs » découvrez le comportement étrange des constituants de la terre (sable, eau, argile) et vous allez comprendre comment et pourquoi il est possible de construire en terre crue. 👇
---------
[ Expérience 6.05] Hydrophile et hydrophobe
L’eau mouille. C’est une évidence, pourtant ce n’est pas aussi systématique qu’on le croit. Certaines surfaces solides repoussent l’eau à tel point qu’elles restent sèches après avoir été trempée dans l’eau. On dit que ce sont des surfaces hydrophobes. A l’inverse, une surface qui attire l’eau est dite hydrophile.
Lorsqu’on pose une goutte d’eau sur du verre très propre, on la voit s’étaler complètement : le verre est hydrophile. Sur une plaque de plexiglas, l’eau reste rassemblée en gouttes arrondies : le plexiglas est moins hydrophile que le verre. Enfin sur une surface fluorisée, l’eau forme des perles d’eau, elle est complètement repoussée par le support : c’est une surface hydrophobe.
——————
Les ateliers "Grains de Bâtisseurs" sont de petites expériences scientifiques simples pour découvrir comment il est possible de passer d'un tas de terre à un mur puis à des édifices capables de durer des siècles et de résister aux intempéries. Entrez avec émerveillement au coeur de la matière en grains et de ses comportements étonnants. Laissez-vous guider, de la géologie à l'architecture, vers la découverte du comportement étrange des constituants de la terre : le sable, l'eau et l'argile. Pour en savoir plus sur la construction en terre crue: http://craterre.org/
#ExpérienceScientifique #TerreCrue #construction
Licence Creative Commons : BY + NC + ND
Co-production : CRAterre-ENSAG, amàco, les films du lierre
——————
ABONNEZ-VOUS
→ https://www.youtube.com/channel/AtelierAmaco/?sub_confirmation=1
Recevez la newsletter 'Matière à informer'
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