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Percentage yield

Chemistry

  • The percentage yield tells you about the overall success of an experiment. It compares what you think you should get to what you actually get. (predicted and actual yield)
  • Actual and predicted yields:
  • The more reactants you start with the higher the actual yield will be
  • The predicted yield is calcualted by a balanced reaction equation
  • Formula
  • Percentage yield = actual yield (g)
  •                              predicted yield (g) 
  • The maximum percentage is 100, so therefore a percentage yield is always between 0 and 100%
  • 100% means you will get all the product you expect
  • 50% means you will

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