# A student dissolves copper sulfate crystals in water and then wants to recover pure copper sulfate crystals from the solution. Describe the process of crystallisation that the student should use to obtain dry copper sulfate crystals from the solution.

> Edexcel GCSE Chemistry (1CH0) — 2.2 Methods of separating and purifying substances · Describe · 4 marks

## Mark scheme (4 marks)

1. Heat the copper sulfate solution
2. Heat until crystals start to form (saturated solution reached)
3. Leave the solution to cool so that crystals form
4. Filter the crystals from the remaining solution to collect them

## Key terms

- [crystallisation](https://www.gradenine.co.uk/glossary/crystallisation)
- [solution](https://www.gradenine.co.uk/glossary/solution)

## Related

- [Revision notes for Edexcel GCSE Chemistry (1CH0)](https://www.gradenine.co.uk/learn)
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Source: [GradeNine](https://www.gradenine.co.uk/q/a-student-dissolves-copper-sulfate-crystals-b37557a1) · Published by Druglandscape Ltd.