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5.1 Monitoring chemical reactions

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Question 12

A laboratory technician needs to react all of 20.0 cm3\mathrm{cm^{3}}cm3 of 0.180 mol/dm3\mathrm{mol/dm^{3}}mol/dm3 sulfuric acid with potassium hydroxide solution.

H2SO4+2KOH→K2SO4+2H2O \mathrm{H_{2}SO_{4} + 2KOH \rightarrow K_{2}SO_{4} + 2H_{2}O} H2​SO4​+2KOH→K2​SO4​+2H2​O

What volume of 0.300 mol/dm3\mathrm{mol/dm^{3}}mol/dm3 potassium hydroxide solution is needed to react completely with the sulfuric acid?

[1]
A

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

B

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

C

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

D

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

Markscheme

5.1 Monitoring chemical reactions Questions

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

152 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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