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3.5 Use of amount of substance in relation to volumes of gases

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Question 23
H

Hydrogen reacts with oxygen when the mixture is sparked.

2H2+O2→2H2O2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}2H2​+O2​→2H2​O

240 cm3 of hydrogen was mixed with 240 cm3 of oxygen and the mixture was sparked. All volumes were measured at the same temperature and pressure.

a.

Determine which gas was in excess and calculate the volume of that gas remaining after the reaction.

[3]
b.

The experiment was repeated at a temperature high enough for the water produced to remain a gas.

Give the volume of water vapour produced.

[1]
Markscheme

3.5 Use of amount of substance in relation to volumes of gases Questions

  1. GCSE
  2. /Chemistry
  3. /3.5 Use of amount of substance in relation to volumes of gases

100 exam-style questions on AQA GCSE Chemistry 3.5 Use of amount of substance in relation to volumes of gases, covering 3.5.1 Volumes of gases. Each one has a worked solution and a mark scheme showing where the marks go.

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