Salt preparations

1 mark · Easy

State one method by which you could obtain a pure, dry sample of sodium sulfate from a solution.

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

Show answer

Evaporation to dryness (or crystallisation, then drying).

Also accept: Crystallisation and drying; Evaporate the water

Common mistakes: Filtration (unless crystals are formed); Distillation

Show mark scheme and worked solution

Marking points

B1 · 1 mark · States evaporation, crystallisation, or another suitable method for pure, dry salt from solution.

Worked solution

Evaporate the solution to dryness, or allow crystals to form and then dry them.