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5.1 Monitoring chemical reactions

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Question 23
H

Aluminium reacts with dilute hydrochloric acid to make hydrogen.

2Al+6HCl→2AlCl3+3H2 \mathrm{2Al + 6HCl \rightarrow 2AlCl_{3} + 3H_{2}} 2Al+6HCl→2AlCl3​+3H2​

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

Relative atomic mass (ArA_rAr​): Al = 27.0

What mass of aluminium reacts completely with excess acid to make 0.360 dm3\mathrm{dm^{3}}dm3 of hydrogen at room temperature and pressure?

[1]
A

0.270 g

B

0.405 g

C

0.608 g

D

9.72 g

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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