Question

A chemist carried out a reaction that involved turning chemicals X (reactant) into chemical Y (product). he placed dots of substance X and some dots of substance Y he had made beforehand and a dot of the reaction mixture on a piece of chromatography paper. the chromatogram he obtained is shown on the right.

has he finished? explain your answer.

please answer below i may be shown as offline but i will read it after

Answer 1

@nincompoop @mayankdevnani @ganeshie8

Answer 2

@Somy @Ciarán95 @Haseeb96 @Anaise @Ann1211 @aaronq @beaubrun @Fanduekisses @inkyvoyd @Kikuo @marcelie @Marie1738 @Preetha @Sachintha @Sylph @threshsupport @uri @welshfella @wil476003 @pooja195 @zepdrix

Answer 3

@Photon336

Answer 4

@zepdrix @Abhisar

Answer 5

"Has he finished" what, exactly?

The chromatogram shows that the reaction mixture contained both reactant and product because there are dots corresponding to each (i.e. same Rf), so the reaction had \(\sf not\) gone to completion (there is still some X).

Answer 6

@Photon336

Answer 7

I thought that the reaction has finished because the reactants are shown in the product (reaction)

Answer 8

this looks like TLC thin layer chromatography

Answer 9

what is that we just started on this core practical
so we haven't learnt much only one lesson we had a cover teacher for the first lesson for this

Answer 10

yeah let me tell you what the point of this is

Answer 11

the point of using TLC is to see if your reaction is complete, or to see whether there's a reactant in your finished product

Answer 12

how do u do that

Answer 13

You need A. Your TLC paper, and B a a jar, called a chamber.

Answer 14

follow?

Answer 15

ok

Answer 16

now the second thing is that you need to create a solvent system

Answer 17

usually it's some ratio of ethyl acetate to hexane

Answer 18

the point of this is to choose a solvent system that will separate the compounds in your mixture.

Answer 19

K

Answer 20

the idea here is that when we chose the right solvent system, our compounds will separate creating the dots.

Answer 21

ok

Answer 22

so once you've created your solvent system. you take a bit of your solvent and you pour it into your jar.

but the most important thing is that you need to draw a line on your tlc paper towards the bottom about 1 inch from the bottom in pencil.

so the most crucial part is what we call spotting. your lab teacher might give you like little spotting tubes. i'll explain what this is.