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4.2 Reactions of acids

4.2 Reactions of acids

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Question 3

To determine the precise concentration of sulfuric acid (H2SO4\text{H}_2\text{SO}_4H2​SO4​) in a sample of diluted battery acid, a technician performs a titration.

A 25.00 cm325.00\text{ cm}^325.00 cm3 aliquot of the sulfuric acid solution requires 32.50 cm332.50\text{ cm}^332.50 cm3 of 0.0800 mol/dm30.0800\text{ mol/dm}^30.0800 mol/dm3 potassium hydroxide (KOH\text{KOH}KOH) solution for complete neutralisation.

The equation for the neutralisation reaction is:

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

Calculate the concentration of the sulfuric acid in mol/dm3\text{mol/dm}^3mol/dm3.

[3]
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 4.2.1 Reactions of acids with metals, 4.2.2 Neutralisation of acids and salt production, 4.2.3 Soluble salts, 4.2.4 The pH scale and neutralisation, 4.2.5 Titrations, and 4.2.6 Strong and weak acids (HT only). Each one has a worked solution and a mark scheme showing where the marks go.

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