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5.1 Monitoring chemical reactions

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Question 18

Production records for a heat-resistant pigment give the following data.

ProcessData
Production of the intermediateTheoretical yield = 48.0 kg; mass collected = 39.6 kg
Conversion of the intermediate into pigmentPercentage yield = 72.0%

The whole mass of intermediate collected is used in the conversion.

Calculate the overall percentage yield of the pigment.

[3]
Markscheme

5.1 Monitoring chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /5.1 Monitoring chemical reactions

152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.

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