A mixture of salt and sugar has to be separated, using the solvent ethanol. Draw a diagram to show how you will separate the salt.

Explain the term in your own words:

Soluble

Look at the table and answer:

Which substance in it is the most soluble?

Look at the table and answer:

About how many times silver nitrate is a more soluble substance than potassium sulphate, at ${25}^{°}\mathrm{C}$?

Look at the table and answer:

Name one other group of salts that are always soluble.

The diagram below shows a chromatogram for a mixture of amino acids. 

The solvent was a mixture of water, butanol and ethanoic acid. How will the ${\mathrm{R}}_{\mathrm{f}}$values change if the solvent travels only $6$cm?