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3.3 Yield and atom economy of chemical reactions

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Question 17
H

Copper sulfate is made by reacting copper oxide with sulfuric acid.

CuO+H2SO4→CuSO4+H2O\mathrm{CuO + H_2SO_4 \rightarrow CuSO_4 + H_2O}CuO+H2​SO4​→CuSO4​+H2​O

Relative formula masses (MrM_rMr​): CuO\mathrm{CuO}CuO = 79.5, CuSO4\mathrm{CuSO_4}CuSO4​ = 159.5

A student needs to make 8.0 g of copper sulfate. The percentage yield of the method is 80 %.

What is the minimum mass of copper oxide the student should use?

[1]
A

3.19 g

B

3.99 g

C

4.98 g

D

6.23 g

Markscheme

3.3 Yield and atom economy of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.3 Yield and atom economy of chemical reactions

39 exam-style questions on AQA GCSE Chemistry 3.3 Yield and atom economy of chemical reactions, covering 3.3.1a Percentage yield, 3.3.1b Theoretical mass of a product, 3.3.2a Atom economy, and 3.3.2b Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.

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