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Elements, compounds and mixtures

Elements, compounds and mixtures

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Question 3

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.

a.

Pure water from an aqueous copper(II) sulfate solution

[1]
b.

Ethanol from a liquid mixture of ethanol (boiling point 78∘C78^\circ\text{C}78∘C) and water (boiling point 100∘C100^\circ\text{C}100∘C)

[1]
c.

Barium sulfate, BaSO4(s)\text{BaSO}_4(\text{s})BaSO4​(s), from a suspension of barium sulfate in water

[1]
d.

Solid copper(II) sulfate crystals, CuSO4⋅5H2O(s)\text{CuSO}_4 \cdot 5\text{H}_2\text{O}(\text{s})CuSO4​⋅5H2​O(s), from an aqueous solution of copper(II) sulfate

[1]
Markscheme

Elements, compounds and mixtures Questions

  1. IGCSE
  2. /Chemistry
  3. /Elements, compounds and mixtures

29 exam-style questions on Edexcel IGCSE Chemistry Elements, compounds and mixtures. Each one has a worked solution and a mark scheme showing where the marks go.

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