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Amount of substance

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Question 18

The reaction between manganate(VII) ions and ethanedioate ions in acidic solution is represented by the following equation:

2MnO4−+5C2O42−+16H+→2Mn2++10CO2+8H2O 2\text{MnO}_4^- + 5\text{C}_2\text{O}_4^{2-} + 16\text{H}^+ \rightarrow 2\text{Mn}^{2+} + 10\text{CO}_2 + 8\text{H}_2\text{O} 2MnO4−​+5C2​O42−​+16H+→2Mn2++10CO2​+8H2​O

What volume, in dm3\text{dm}^3dm3, of 0.0800 mol dm-3 potassium manganate(VII) solution is required to completely oxidize 0.0500 mol of ethanedioate ions?

A

0.2500.2500.250

B

0.6250.6250.625

C

1.561.561.56

D

4.004.004.00

Markscheme

Amount of substance Questions

  1. A Level
  2. /Chemistry
  3. /Amount of substance

79 exam-style questions on AQA A Level Chemistry Amount of substance, covering Relative atomic mass and relative molecular mass, The mole and the Avogadro constant, The ideal gas equation, Empirical and molecular formula, and Balanced equations and associated calculations. Each one has a worked solution and a mark scheme showing where the marks go.

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