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3.2 Methods of separating and purifying substances

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Question 10
F

Why is crystallisation preferable to heating a salt solution to complete dryness?

[1]
A

It removes insoluble solids from the salt solution

B

It produces a larger mass of the dry salt

C

It removes dissolved coloured impurities by filtering

D

It stops the salt decomposing and gives purer crystals

Markscheme

3.2 Methods of separating and purifying substances Questions

  1. GCSE
  2. /Chemistry
  3. /3.2 Methods of separating and purifying substances

48 exam-style questions on Edexcel GCSE Chemistry 3.2 Methods of separating and purifying substances, covering 3.2.1 Pure substances and mixtures, 3.2.2 Techniques for separating mixtures, 3.2.3 Paper chromatography and Rf values, and 3.2.4 Making water potable. Each one has a worked solution and a mark scheme showing where the marks go.

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