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5.1 Monitoring chemical reactions

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Question 21
H

A student reacts 5.00 g of calcium carbonate with excess dilute hydrochloric acid.

CaCO3+2HCl→CaCl2+H2O+CO2 \mathrm{CaCO_{3} + 2HCl \rightarrow CaCl_{2} + H_{2}O + CO_{2}} CaCO3​+2HCl→CaCl2​+H2​O+CO2​

One mole of any gas occupies 24 dm3\mathrm{dm^{3}}dm3 at room temperature and pressure.

Relative atomic mass (ArA_rAr​): C = 12.0 O = 16.0 Ca = 40.1

What volume of carbon dioxide is made at room temperature and pressure?

[1]
A

0.00208 dm3\mathrm{dm^{3}}dm3

B

1.20 dm3\mathrm{dm^{3}}dm3

C

2.40 dm3\mathrm{dm^{3}}dm3

D

120 dm3\mathrm{dm^{3}}dm3

Markscheme

5.1 Monitoring chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /5.1 Monitoring chemical reactions

57 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.

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