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3.3 Types of chemical reactions

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Question 5

A measured volume of calcium hydroxide solution is just neutralised by hydrochloric acid.

Ca(OH)2+2HCl→CaCl2+2H2O \mathrm{Ca(OH)_{2} + 2HCl \rightarrow CaCl_{2} + 2H_{2}O} Ca(OH)2​+2HCl→CaCl2​+2H2​O

The ions present before the reaction are Ca2+\mathrm{Ca^{2+}}Ca2+, OH−\mathrm{OH^{-}}OH−, H+\mathrm{H^{+}}H+ and Cl−\mathrm{Cl^{-}}Cl−.

Which ion from the acid and which ion from the alkali make up the dissolved salt?

[1]
A

H+\mathrm{H^{+}}H+ from the acid and Ca2+\mathrm{Ca^{2+}}Ca2+ from the alkali

B

H+\mathrm{H^{+}}H+ from the acid and OH−\mathrm{OH^{-}}OH− from the alkali

C

Cl−\mathrm{Cl^{-}}Cl− from the acid and Ca2+\mathrm{Ca^{2+}}Ca2+ from the alkali

D

Cl−\mathrm{Cl^{-}}Cl− from the acid and OH−\mathrm{OH^{-}}OH− from the alkali

Markscheme

3.3 Types of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.3 Types of chemical reactions

112 exam-style questions on OCR GCSE Chemistry 3.3 Types of chemical reactions, covering 3.3.1 Oxidation and reduction in terms of oxygen, 3.3.2 Acids, alkalis and neutralisation, 3.3.3 The pH scale and measuring pH, 3.3.4 Oxidation and reduction in terms of electrons, 3.3.5 Dilute and concentrated, weak and strong acids, and 3.3.6 Hydrogen ion concentration and pH. Each one has a worked solution and a mark scheme showing where the marks go.

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