The Rf value is the distance travelled by the solute divided by the distance travelled by the solvent. The distance travelled by the solute is the length measured from the start line to the centre of the spot. The distance travelled by the solvent is the length measured from the start line to the solvent front.
My chem teacher spent 2 months explaining this but I still didn't get it. It took 7 minutes for you to explain it to me completely - Thanks So MUCH!!!!
Very helpful. This might be one of the few videos about chromatography that not only demonstrated how to do the procedure, it also taught what the purpose of the procedure. A lot of the videos here in youtube doesn't tell what the point of chromatography is.
Thank you so much , now I can identify the dyes in a marker . Thank thank thank . This video helped me a lot , I had a problem huge with chromatography. But not any more thanks to this video .
My cousin thought me this when I was in year 6 and now my chem teacher thought me it, she asked us to use this vid as notes, and its real easy so thank you
VERY GOOD AND EASY REPRESENTATION... THANK S A LOT FOR MAKING THIS KIND OF VIDEO... THESE KIND OF VIDEOS MAKES TEACHING EASY... I WANT MORE VIDEOS LIKE THIS... PLEASE MAKE VIDEO FOR ELECTROLYSIS CHAPTER
This notes are written and sourced from the video, it might not be accurate but I hope this helps other than copy and pasting lol. I am tired of writing this oof Explanations: 0:34 - 0:48 0:56 - 1:04 3:00 - 3:06 4:51 - Questions: 0:48 - 0:55 - Discussions: 3:28 3:52 6:29 7:13 - Error thingies: 7:32 - What is chromatography? Chromatography is a technique used to separate small amounts of substances from a mixture based on the different solubility of the components in the particular solvent. - What is the main advantage of using chromatography? -Only a small sample is required -It can be used as a method to determine if the sample is pure. - Why is water a suitable solvent? -Because the samples are soluble in water. - Why do we have to cover the beaker with a lid? -To minimize the evaporation of solvent. -To ensure that the atmosphere in the beaker is saturated with solvent vapor. -Saturating the atmosphere in the beaker with vapor stops the solvent from evaporating as it rises up the paper. - If the dye is not well separated, we can consider changing the solvent.
Thanks a lot sir for explaining us in such a nice way even our school teachers refers your video for teaching us in a better way !!!! During online classes on Google meet on the time of corona 😷
For solvents that are not too volatile, it still works without a lid. The correct practice of course is to include the lid, which is how it is done in practice by organic and analytical chemists using the method called Thin Layer Chromatography. You can read more about it here: www.chemguide.co.uk/analysis/chromatography/thinlayer.html
Both the paper (we call it the stationary phase) and the solvent (we call it the mobile phase) have an attraction for the substance. If the sample is more attracted (a.k.a. more adsorbed) to the paper, it is less likely to be carried by the solvent and therefore travels a shorter distance. If the sample is more soluble in the solvent (i.e. less adsorbed by the paper), it is more likely to be carried up further by the solvent. How much a sample is adsorbed onto the paper or dissolved in a solvent is determined by the concept of polarity. This is why different solvents or different materials used to make the stationary phase would affect the Rf values.
It depends on your choice of stationary phase as well as the pigments you intend to separate. For example, if you're separating the pigments in spinach leaves (chlorophyll, xanthophyll, carotene) on silica TLC plates, you can try n-hexane:acetone (7:3 v/v). You can find the procedure quite easily on other websites or in science journal articles.
bro i have presentation about "chromatography paper experiment" in this week so i try this experiment but my inks aren't migrate to above.Why ?bro.I'm stuck😭😭
@@MrJansenTan yay it's work.But my inks migrate to above little bit then not like you😕.I think your filter paper is thick and perfect.My filter paper is soft and melleable.Can i use A4 sheet?plz tell me bro and thank you so much. 🤗🤗🤗
Hi Hifza, in general, you would have to consider the polarity of the substances you intend to separate. Then choose an appropriate solvent or solvent mixture from there.
Thank you all for your comments and support, glad you found this useful!
The Rf value is the distance travelled by the solute divided by the distance travelled by the solvent.
The distance travelled by the solute is the length measured from the start line to the centre of the spot. The distance travelled by the solvent is the length measured from the start line to the solvent front.
@@MrJansenTan you are awsome can you give me a shoutout
Why is it best to use the farthest distance traveled by a sugar if and when the solvent went over the paper?
@@MrJansenTan thanku soo much
@@MrJansenTan length of filter paper ?? Please tell
My chem teacher spent 2 months explaining this but I still didn't get it. It took 7 minutes for you to explain it to me completely - Thanks So MUCH!!!!
POV:Some people have been sent here from their teacher.
Lol
POV: that one person who watches this in there free time O.o
@@fatimagreatfatima lmao I swear every teacher brought their kids here.
yeah
@@eshoanimates411 Mhm those kids who watch in there free time, r u fricking albert einstein
i didn't understand when i learned it in my class, but you explain very well and i got it now, thanks a lot!!!
@devita nurul
You are ture this video is good
Three words.........
Helpful,awesome,and underrated
How dare you to make the coments disapear
Loved this video! Thank you for explaining all the aspects and the most common errors too, it will help me avoid them in the future :)
All of these youtubers are really helping me in chemistry its actually a fun and interesting subject thanks Mr. Jansen Tan
Well after hours of search I finally find a decent video online... thanks !
wow, this is really good. it's literally almost exactly how TLC works, and just with paper chromatography! very well made.
Thanks a a lot ,that was the best demonstration I ever seen about paper chromatography .
I totally agree
Very helpful. This might be one of the few videos about chromatography that not only demonstrated how to do the procedure, it also taught what the purpose of the procedure. A lot of the videos here in youtube doesn't tell what the point of chromatography is.
i loved how you included questions in between! great video :-D
Looks good. This enables the student to see more specific example on how the theory works
tysm i could not understand chromatogrpahy but after this video i beilive i will get full marks 🙏🙏
Why are UA-cam teachers better than real teachers
I bet I can graduate jus by watching UA-cam lol
Thank you I have a test tomorrow so wish me luck
Best of luck for your test! :)
This is such an amazing video. I tasked my students with watching it because it is simply excellent.
Thank you so much , now I can identify the dyes in a marker . Thank thank thank . This video helped me a lot , I had a problem huge with chromatography. But not any more thanks to this video .
My cousin thought me this when I was in year 6 and now my chem teacher thought me it, she asked us to use this vid as notes, and its real easy so thank you
thank you so much! It’s much easier for me to learn with videos and this was extremely helpful. great work!!
Thanks, I needed this for my science homework.
lmao same our substitute teacher told us to draw a diagram of this for our homework.
Very well explained, Thanks Jansen.
This is totally amazing - I shall recommend you to everyone i know ♥️♥️☺️👍
VERY GOOD AND EASY REPRESENTATION... THANK S A LOT FOR MAKING THIS KIND OF VIDEO... THESE KIND OF VIDEOS MAKES TEACHING EASY... I WANT MORE VIDEOS LIKE THIS... PLEASE MAKE VIDEO FOR ELECTROLYSIS CHAPTER
srry mate i was only sent here by my science teacher for online learning but thx for helping me pass my science x
It's elaborate and useful for our Science Lesson. Thank you!
I am having a quiz tomorrow and your explanation is just awesome Thanks alot
what did you get on the quiz pusy
@@PHILLYMEDIC69 lmao
It's been 3 years. Tell us your marks dude
Wats the mark my dude
Nice video! Helped me understand this a lot more during remote learning.
love the clarity !!
This notes are written and sourced from the video, it might not be accurate but I hope this helps other than copy and pasting lol.
I am tired of writing this oof
Explanations:
0:34 - 0:48
0:56 - 1:04
3:00 - 3:06
4:51
-
Questions:
0:48 - 0:55
-
Discussions:
3:28
3:52
6:29
7:13
-
Error thingies:
7:32
-
What is chromatography?
Chromatography is a technique used to separate small amounts of substances from a mixture
based on the different solubility of the components in the particular solvent.
-
What is the main advantage of using chromatography?
-Only a small sample is required
-It can be used as a method to determine if the sample is pure.
-
Why is water a suitable solvent?
-Because the samples are soluble in water.
-
Why do we have to cover the beaker with a lid?
-To minimize the evaporation of solvent.
-To ensure that the atmosphere in the beaker is saturated with solvent vapor.
-Saturating the atmosphere in the beaker with vapor stops the solvent from evaporating as it rises up the paper.
-
If the dye is not well separated, we can consider changing the solvent.
@Motion FN Haha
Thanks a lot sir for explaining us in such a nice way even our school teachers refers your video for teaching us in a better way !!!! During online classes on Google meet on the time of corona 😷
Thank you so much for dropping by! I'm glad you found the video helpful :)
Sounds from india
@@aryasree3453 👍
Well explained seriously!! Great job
It is a perfect instructions for my chromatography experiment. Thank you
Really you done well thanks for explanation especially in errors
wow.you explained it so well,thanks
Amazing video Mr Tan!
this is so helpful, it helped me out a ton
Very useful.. very well explained.. thank you so much.. 👍🏻
Thanks for the information
was confused about chromatography at first now doubt cleared
here just for class. (duh)
Same
same xD
same lol
Same
Same
Amazing way of understanding
Excellent job 👏🏼 👍 👌
Ma'am recommended us to watch this video. From European university of lefke.
Very helpful. Thanks
Thanks, that was just what I was looking for 😊
Sir ... Good work and your voice is to good
too**
So*
its very helpfull I learnt it well
people who needed to watch this for online school
|
|
Thank you very much, kind sir.
Thank u for explaining this much clear
awesome explanation
It looks like you sped up the actual separation in the video. About how long did the separation take? Thank you for any help!
Hi Jennifer, yes I sped up the video. The actual separation took about 10 minutes.
Nice video.
brilliant video
So helpful I wish I could give this video 2 likes or more
Hi Mr. Tan can you tell me if we can we use tissue paper or butter paper for this experiment… pls reply. Amazing video!
who’s from google classroom
Lol same
here
im from schoology but yeah same thing
tHe HeAvY iS dEaD ME TOO
@@ainhoaarean21 wheyyy
very clear and concise explanations thanks
very well explained....😄😅 thank you so much
Very good vedio it's helps to every student's
And also makes them suffer
We did it in class without a lid and it worked fine why is that?
For solvents that are not too volatile, it still works without a lid. The correct practice of course is to include the lid, which is how it is done in practice by organic and analytical chemists using the method called Thin Layer Chromatography. You can read more about it here: www.chemguide.co.uk/analysis/chromatography/thinlayer.html
Mr. Jansen Tan thanks! Your videos are really helpful
Super helpful! thank you
this is amazing! thanks
I like it thank u this will help me pass
What kind of solvent did you use?
Thanks My Man! :)🌺💐
Chromatography is used to separate small amounts of substances from a mixture based on the different solubility components
Love the RLM signature music
What would be some sources of error of this experiment?
Very informative. Thank you
very helpful video. Thank youuu !
Very good
What kind of substance did you used? It is okay to use any inks just like in the Markers?
It is best to use markers with water-soluble inks
Thanks for the video
Thank you very helpful 👍
Good video
good buddy just studied today
Thanks this was very useful
Nice explained. I recommend to add bibliography
good for children to understand
Sir u didn't tell about the calculations after the qualitative analysis
EOY IS COMING AND THIS IS HELPFUL
I'm only form 1, this video is for me right?
Thank you so much!
Can we use other paper than filter paper
Yes you can try with coffee filters
Thank you so much sir 🙏💙
Thank you :)
Thank you sir
NICE 😊
Sorry but may I know why the most soluble substance is on the top of the paper? I don’t really understand the concept 😭 thank you 🙏
Both the paper (we call it the stationary phase) and the solvent (we call it the mobile phase) have an attraction for the substance. If the sample is more attracted (a.k.a. more adsorbed) to the paper, it is less likely to be carried by the solvent and therefore travels a shorter distance. If the sample is more soluble in the solvent (i.e. less adsorbed by the paper), it is more likely to be carried up further by the solvent.
How much a sample is adsorbed onto the paper or dissolved in a solvent is determined by the concept of polarity. This is why different solvents or different materials used to make the stationary phase would affect the Rf values.
@@MrJansenTan thank you so much for the reply, I understand now ☺️ truly appreciate your help.
Thank you so much🤗😇🤗
thank you
How do we take the distance travelled by a colour? Where exactly we mark the dot?
We measure the distance from the pencil (start) line to the centre of the spot.
What is the solvent for food grade experiments? Like from plants and seeds?
It depends on your choice of stationary phase as well as the pigments you intend to separate. For example, if you're separating the pigments in spinach leaves (chlorophyll, xanthophyll, carotene) on silica TLC plates, you can try n-hexane:acetone (7:3 v/v). You can find the procedure quite easily on other websites or in science journal articles.
Which school do you teach in
bro i have presentation about "chromatography paper experiment" in this week so i try this experiment but my inks aren't migrate to above.Why ?bro.I'm stuck😭😭
Do check that you are using markers with water-soluble inks if your solvent is water
@@MrJansenTan yay it's work.But my inks migrate to above little bit then not like you😕.I think your filter paper is thick and perfect.My filter paper is soft and melleable.Can i use A4 sheet?plz tell me bro and thank you so much. 🤗🤗🤗
Regular A4 paper might not be ideal because they may be coated. Try using coffee filters if you can’t get hold of filter paper.
@@MrJansenTan thx for your suggestions.If u not help me,i don't know what to do.Thanks you so much. Arigato😊😊
most welcome!
video tres interesante
What can we use instead of filter paper
you can try coffee filters
Sir please tell me how we select different paper chromatography techniques on the base of type of substance being separated?.....reply plzzz
Hi Hifza, in general, you would have to consider the polarity of the substances you intend to separate. Then choose an appropriate solvent or solvent mixture from there.
Great vid