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4.2 Reactions of acids

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Question 21
H

In a titration, 25.0 cm3 of 0.200 mol/dm3 sodium hydroxide solution was neutralised by 18.0 cm3 of sulfuric acid.

2NaOH+H2SO4→Na2SO4+2H2O2\text{NaOH} + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + 2\text{H}_2\text{O}2NaOH+H2​SO4​→Na2​SO4​+2H2​O

The relative formula mass (MrM_rMr​) of H2SO4\text{H}_2\text{SO}_4H2​SO4​ is 98.

What is the concentration of the sulfuric acid?

[1]
A

6.81 g/dm36.81\ \text{g/dm}^36.81 g/dm3

B

13.6 g/dm313.6\ \text{g/dm}^313.6 g/dm3

C

27.2 g/dm327.2\ \text{g/dm}^327.2 g/dm3

D

54.4 g/dm354.4\ \text{g/dm}^354.4 g/dm3

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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