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

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Question 24
H

A student added an excess of dilute hydrochloric acid to a small mass of calcium carbonate and measured the volume of carbon dioxide produced.

CaCO3+2HCl→CaCl2+H2O+CO2\text{CaCO}_3 + 2\text{HCl} \rightarrow \text{CaCl}_2 + \text{H}_2\text{O} + \text{CO}_2CaCO3​+2HCl→CaCl2​+H2​O+CO2​

Figure shows the student's results.

Figure: The volume of carbon dioxide produced against time for the reaction of calcium carbonate with an excess of dilute hydrochloric acid

image

The volume of one mole of any gas at room temperature and pressure (rtp) is 24 dm3. The relative formula mass of calcium carbonate is 100.

a.

Use Figure to determine the final volume of carbon dioxide produced.

[1]
b.

Calculate the amount, in moles, of carbon dioxide produced.

[2]
c.

Determine the mass of calcium carbonate that reacted.

[2]
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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