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3.3 Yield and atom economy of chemical reactions

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Question 22

A company makes a solid product used in water treatment. The table gives data for the reaction.

QuantityValue
Total Mr M_r\,Mr​ of all reactants in the balanced equation250
Mr M_r\,Mr​ of the desired product210
Maximum theoretical mass of the desired product15.0 kg
Mass of the desired product collected9.75 kg

Some of the desired product remains in the equipment during separation.

a.

Calculate the percentage atom economy of the reaction.

[2]
b.

Calculate the percentage yield of the process.

[2]
c.

Explain how the product remaining in the equipment affects the percentage yield and the atom economy.

[2]
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

104 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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