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5.1 Monitoring chemical reactions

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Question 24
H

A student adds excess magnesium to 50.0 cm3\mathrm{cm^{3}}cm3 of 0.200 mol/dm3\mathrm{mol/dm^{3}}mol/dm3 hydrochloric acid.

Mg+2HCl→MgCl2+H2 \mathrm{Mg + 2HCl \rightarrow MgCl_{2} + H_{2}} Mg+2HCl→MgCl2​+H2​

One mole of any gas occupies 24 000 cm3\mathrm{cm^{3}}cm3 at room temperature and pressure.

What volume of hydrogen is made at room temperature and pressure?

[1]
A

60 cm3\mathrm{cm^{3}}cm3

B

120 cm3\mathrm{cm^{3}}cm3

C

240 cm3\mathrm{cm^{3}}cm3

D

480 cm3\mathrm{cm^{3}}cm3

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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