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4.2 Reactions of acids

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Question 23

A student uses a pipette to put 25.0 cm3 of potassium hydroxide solution into a conical flask. Nitric acid of concentration 0.150 mol/dm3 is added from a burette. The mean titre is 21.0 cm3.

KOH+HNO3→KNO3+H2O\text{KOH} + \text{HNO}_3 \rightarrow \text{KNO}_3 + \text{H}_2\text{O}KOH+HNO3​→KNO3​+H2​O

Which value is the concentration of the potassium hydroxide solution?

[1]
A

0.126 mol/dm30.126\ \text{mol/dm}^30.126 mol/dm3

B

0.0630 mol/dm30.0630\ \text{mol/dm}^30.0630 mol/dm3

C

0.00315 mol/dm30.00315\ \text{mol/dm}^30.00315 mol/dm3

D

0.179 mol/dm30.179\ \text{mol/dm}^30.179 mol/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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