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Elements, compounds and mixtures

Elements, compounds and mixtures

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Question 16

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 ethanol from a mixture of ethanol and water

[1]
b.

Precipitated calcium carbonate, CaCO3(s)\text{CaCO}_3(\text{s})CaCO3​(s), from a mixture of calcium carbonate and water

[1]
c.

Pure liquid water from an aqueous solution of copper(II) sulfate, CuSO4(aq)\text{CuSO}_4(\text{aq})CuSO4​(aq)

[1]
d.

Hydrated copper(II) sulfate crystals, CuSO4⋅5H2O(s)\text{CuSO}_4\cdot5\text{H}_2\text{O}(\text{s})CuSO4​⋅5H2​O(s), from an aqueous solution of copper(II) sulfate, CuSO4(aq)\text{CuSO}_4(\text{aq})CuSO4​(aq)

[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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