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Percentage Yield

Theoretical calculations assume all the reactants are converted into products and calculate the maximum possible amount of product or the theoretical yield. In practice:
  • the reaction may not go to completion
  • side reactions may take place alongside the main reaction
  • purification of the product may result in the loss of some of the product in the apparatus
    • The percentage yield is the actual yield ÷ theoretical yield (x100%)

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    Specification: AQA Chemistry (7404), AS-level, 3.1.2.5 Balanced equations and associated calculations. Topic: Amount of Substance.

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