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3.3 Yield and atom economy of chemical reactions

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Question 6

A ceramics manufacturer uses a reaction that forms the desired pigment P and an unwanted by-product Q. The manufacturer wants a process with a higher atom economy for pigment P.

Which statement describes a change that would increase the atom economy for pigment P?

[1]
A

Use an alternative reaction in which pigment P is the only product

B

Collect pigment P more carefully so less is lost during separation

C

Use a larger excess of one reactant so the other is fully used

D

Sell by-product Q as a useful substance instead of disposing of it

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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