In a chromatography experiment, eight coloured substances were spotted onto a piece of filter paper. Three were the basic coloured red, blue and yellow. The other were unknown substances, labelled A-E. This shows the resulting chromatogram :
Which contains all three basic colours?
Important Questions on Separating Substances
In a chromatography experiment, eight coloured substances were spotted on a piece of filter paper. Three were the basic coloured red, blue and yellow. The other was unknown substances, labelled A-E. This shows the resulting chromatogram :
The solvent was propanone. Which of the three basic colours are the most soluble in propanone?
The diagram below shows a chromatogram for a mixture of amino acids.
The solvent was a mixture of water, butanol and ethanoic acid. Using the table of values given, identify the two amino acids.
The diagram below shows a chromatogram for a mixture of amino acids.
The solvent was a mixture of water, butanol and ethanoic acid. Which of them is less soluble in the solvent?
The diagram below shows a chromatogram for a mixture of amino acids.
| Amino acid | value |
| Cysteine | 0.08 |
| Lysine | 0.14 |
| Glycine | 0.26 |
| Serine | 0.27 |
| Alanine | 0.38 |
| Proline | 0.43 |
| Valine | 0.60 |
| Leucine | 0.73 |
The solvent was a mixture of water, butanol and ethanoic acid. How will the values change if the solvent travels only cm?
