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4.2 Reactions of acids

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Question 2

A 30.0 cm3 sample of potassium hydroxide solution was exactly neutralised by 24.0 cm3 of 0.150 mol/dm3 sulfuric acid.

H2SO4+2KOH→K2SO4+2H2O\text{H}_2\text{SO}_4 + 2\text{KOH} \rightarrow \text{K}_2\text{SO}_4 + 2\text{H}_2\text{O}H2​SO4​+2KOH→K2​SO4​+2H2​O

The relative formula mass (MrM_rMr​) of KOH\text{KOH}KOH is 56.

What is the concentration of the potassium hydroxide solution in g/dm3\text{g/dm}^3g/dm3?

[1]
A

13.4 g/dm313.4\ \text{g/dm}^313.4 g/dm3

B

26.9 g/dm326.9\ \text{g/dm}^326.9 g/dm3

C

3.36 g/dm33.36\ \text{g/dm}^33.36 g/dm3

D

6.72 g/dm36.72\ \text{g/dm}^36.72 g/dm3

Markscheme

4.2 Reactions of acids Questions

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

88 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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