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2.1 Purity and separating mixtures

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Question 10

A student wants to obtain pure water from a sample of sea water.

Which method should the student use?

[1]
A

Pour the sea water through filter paper and keep the filtrate.

B

Heat the sea water and condense the vapour that is given off.

C

Heat the sea water in an evaporating basin until it is dry.

D

Warm the sea water until crystals form, then leave it to cool.

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2.1 Purity and separating mixtures Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Purity and separating mixtures

102 exam-style questions on OCR GCSE Chemistry 2.1 Purity and separating mixtures, covering 2.1.1 Pure substances and melting point data, 2.1.2 Relative formula mass and empirical formula, 2.1.3 Formulations as useful mixtures, 2.1.4 Techniques for separating mixtures, and 2.1.5 Chromatography and Rf values. Each one has a worked solution and a mark scheme showing where the marks go.

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