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3.3 Yield and atom economy of chemical reactions

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Question 7
F

Hydrogen can be made by reacting magnesium with hydrochloric acid.

Mg+2HCl→MgCl2+H2\mathrm{Mg + 2HCl \rightarrow MgCl_2 + H_2}Mg+2HCl→MgCl2​+H2​

Relative atomic masses (ArA_rAr​): H = 1, Mg = 24, Cl = 35.5

What is the percentage atom economy for making hydrogen?

[1]
A

2.1 %

B

3.3 %

C

50.0 %

D

97.9 %

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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