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6.2 Quantitative analysis

6.2 Quantitative analysis

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Question 28

Copper can be extracted by heating copper(II) oxide with carbon.

The balanced chemical equation for the reaction is:

2CuO+C→2Cu+CO2 2\text{CuO} + \text{C} \rightarrow 2\text{Cu} + \text{CO}_2 2CuO+C→2Cu+CO2​

Calculate the percentage atom economy for the production of copper in this reaction.

Relative atomic masses (ArA_rAr​): C=12\text{C} = 12C=12 O=16\text{O} = 16O=16 Cu=63.5\text{Cu} = 63.5Cu=63.5

Relative formula masses (MrM_rMr​): CuO=79.5\text{CuO} = 79.5CuO=79.5 CO2=44\text{CO}_2 = 44CO2​=44

Give your answer to two significant figures.

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Markscheme

6.2 Quantitative analysis Questions

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

157 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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