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4.2 Reactions of acids

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Question 6
H

Magnesium reacts with dilute hydrochloric acid to produce magnesium chloride and hydrogen.

Which half equation represents the reduction that takes place?

[1]
A

Mg→Mg2++2e−\text{Mg} \rightarrow \text{Mg}^{2+} + 2\text{e}^-Mg→Mg2++2e−

B

2H++2e−→H22\text{H}^+ + 2\text{e}^- \rightarrow \text{H}_22H++2e−→H2​

C

H2→2H++2e−\text{H}_2 \rightarrow 2\text{H}^+ + 2\text{e}^-H2​→2H++2e−

D

Mg2++2e−→Mg\text{Mg}^{2+} + 2\text{e}^- \rightarrow \text{Mg}Mg2++2e−→Mg

Markscheme

4.2 Reactions of acids Questions

  1. GCSE
  2. /Chemistry
  3. /4.2 Reactions of acids

40 exam-style questions on AQA GCSE Chemistry 4.2 Reactions of acids, covering 4.2.1a Reactions of acids with metals, 4.2.1b Redox in acid-metal reactions, 4.2.2 Neutralisation of acids and salt production, 4.2.3 Soluble salts, 4.2.4 The pH scale and neutralisation, 4.2.5a Titrations, 4.2.5b Calculating quantities in titrations, and 4.2.6 Strong and weak acids. Each one has a worked solution and a mark scheme showing where the marks go.

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