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6.2 Quantitative analysis

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Question 40

Hydrogen peroxide decomposes when a catalyst is added:

2H2O2(aq)→2H2O(l)+O2(g)\mathrm{2H_2O_2(aq) \rightarrow 2H_2O(l) + O_2(g)}2H2​O2​(aq)→2H2​O(l)+O2​(g)

0.15 mol of hydrogen peroxide decomposes completely.

One mole of gas occupies 24 dm3 at room temperature and pressure.

Calculate the volume of oxygen produced at room temperature and pressure, in cm3\mathrm{cm^3}cm3.

[3]
Markscheme

6.2 Quantitative analysis Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Quantitative analysis

151 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.

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