GCSE / O Levels Chemistry

The diagram represents a chromatogram of the colourless acids present in a drink. The
chromatogram has been treated with a locating agent.
A table of R, values for the possible acids is given.
- solvent front
acid
R, value
tartaric
0.14
citric
0.16
3.
malic
0.23
lactic
0.45
2.
1.
succinic
0.50
- origin
Which acids are present in the drink?
A citric acid, malic acid and lactic acid
B citric acid, malic acid and succinic acid
c malic acid, lactic acid and succinic acid
D tartaric acid, citric acid and malic acid


Methods of Purification and Analysis | 2019 - M/J - 5070/12 | Q3