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4.1 Acids

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Question 13
H

Magnesium oxide is an insoluble base. It reacts with dilute hydrochloric acid to form magnesium chloride solution and water. Which is the ionic equation for this reaction?

[1]
A

H+(aq)+OH−(aq)→H2O(l)\mathrm{H^{+}(aq) + OH^{-}(aq) \rightarrow H_{2}O(l)}H+(aq)+OH−(aq)→H2​O(l)

B

O2−(aq)+2H+(aq)→H2O(l)\mathrm{O^{2-}(aq) + 2H^{+}(aq) \rightarrow H_{2}O(l)}O2−(aq)+2H+(aq)→H2​O(l)

C

Mg2+(aq)+2Cl−(aq)→MgCl2(aq)\mathrm{Mg^{2+}(aq) + 2Cl^{-}(aq) \rightarrow MgCl_{2}(aq)}Mg2+(aq)+2Cl−(aq)→MgCl2​(aq)

D

MgO(s)+2H+(aq)→Mg2+(aq)+H2O(l)\mathrm{MgO(s) + 2H^{+}(aq) \rightarrow Mg^{2+}(aq) + H_{2}O(l)}MgO(s)+2H+(aq)→Mg2+(aq)+H2​O(l)

Markscheme

4.1 Acids Questions

  1. GCSE
  2. /Chemistry
  3. /4.1 Acids

44 exam-style questions on Edexcel GCSE Chemistry 4.1 Acids, covering 4.1.1 Acids, alkalis and the pH scale, 4.1.2 Hydrogen ion concentration and pH, 4.1.3 Dilute and concentrated, weak and strong acids, 4.1.4 Bases, alkalis and the reactions of acids, 4.1.5 Chemical tests for hydrogen and carbon dioxide, 4.1.6 Neutralisation as a reaction of acids with bases, 4.1.7 Preparing soluble salts, and 4.1.8 Solubility rules and preparing insoluble salts. Each one has a worked solution and a mark scheme showing where the marks go.

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