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3.3 Yield and atom economy of chemical reactions

3.3 Yield and atom economy of chemical reactions

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Question 13

Barium sulfate is an insoluble salt used as a contrast agent in medical imaging. It is produced by the reaction between barium chloride solution and sodium sulfate solution.

The equation for the reaction is:

BaCl2(aq)+Na2SO4(aq)→BaSO4(s)+2NaCl(aq) \text{BaCl}_2(\text{aq}) + \text{Na}_2\text{SO}_4(\text{aq}) \rightarrow \text{BaSO}_4(\text{s}) + 2\text{NaCl}(\text{aq}) BaCl2​(aq)+Na2​SO4​(aq)→BaSO4​(s)+2NaCl(aq)

Calculate the percentage atom economy for the production of barium sulfate by this reaction.

Give your answer to 3 significant figures.

Relative formula masses (MrM_rMr​):

  • BaCl2=208\text{BaCl}_2 = 208BaCl2​=208
  • Na2SO4=142\text{Na}_2\text{SO}_4 = 142Na2​SO4​=142
  • BaSO4=233\text{BaSO}_4 = 233BaSO4​=233
  • NaCl=58.5\text{NaCl} = 58.5NaCl=58.5
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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

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

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