Chemistry · Oct / Nov 2023 · Paper 61 · Question 1
0620
As printed in the paper
The question as text
A student uses chromatography to analyse samples of three different dyes. The apparatus the student uses is shown in Fig. 1.1. baseline beaker paper lid Fig. 1.1
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
1(a)[2]
M1 three spots shown horizontally along the baseline
M2 solvent level above / touching the bottom of the paper but below the base line and not touching any of the spots
1(b)[1]
when the ethanol is almost at the top of the paper
1(c)[2]
any two from:
MP1 dye 1 and dye 3 are pure substances / contain only 1 colour / substance
MP2 dye 2 contains dye 1 and dye 3
MP3 all of the dyes were soluble
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