Techniques used in the separation of mixtures include:
A crystallisation
B filtration
C fractional distillation
D simple distillation
For each separation, select the most suitable technique, A, B, C or D, used to obtain the first named substance from the mixture. Each letter may be used once, more than once or not at all.
Pure ethanol from a mixture of ethanol and water
Precipitated calcium carbonate, CaCO3(s)\text{CaCO}_3(\text{s})CaCO3(s), from a mixture of calcium carbonate and water
Pure liquid water from an aqueous solution of copper(II) sulfate, CuSO4(aq)\text{CuSO}_4(\text{aq})CuSO4(aq)
Hydrated copper(II) sulfate crystals, CuSO4⋅5H2O(s)\text{CuSO}_4\cdot5\text{H}_2\text{O}(\text{s})CuSO4⋅5H2O(s), from an aqueous solution of copper(II) sulfate, CuSO4(aq)\text{CuSO}_4(\text{aq})CuSO4(aq)
