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3.3 Yield and atom economy of chemical reactions

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Question 14
F

A reaction has an atom economy of 100 %.

A student carries out the reaction and obtains a percentage yield of 70 %.

Which statement explains these results?

[1]
A

The atom economy must be wrong, because it should equal the yield

B

Some of the reactant atoms formed a waste product in the reaction

C

The reaction made a by-product, so the yield could not reach 100 %

D

The desired product is the only product, but some of it was lost

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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