The table shows solubility information for four solids, P, Q, R and S. A student tried to separate mixtures made from these solids using the procedure below: 1 Put the mixture into a beaker of water and stir it. 2 Filter the mixture. 3 Crystallise one of the solids from the filtrate. Which of the following mixtures could not be separated by this method?
- Aa mixture of P and R
- Ba mixture of Q and P
- Ca mixture of Q and R
- Da mixture of R and S