5.1.19

Percentage Yield

Test yourself

Percentage Yield

The percentage yield for any reaction is always less than 100%. The following 4 factors make sure the percentage yield of reactions stays below 100%:

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Incomplete reactions

  • An incomplete reaction can happen because:
    • The reaction is very slow and hasn't been given enough time to happen.
    • The reaction is reversible and some of the products have been converted back into reactants.
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Waste

  • Some of the chemicals will remain stuck to the apparatus and will be wasted.
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Extraction

  • It might be difficult to fully separate the product from the reaction mixture.
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Side reactions

  • Unexpected reactions (side reactions) can happen. This may mean that the intended product is not created.

Jump to other topics

1States of Matter

2Elements, Compounds & Mixtures

3Atomic Structure

4The Periodic Table

5Chemical Formulae, Equations & Calculations

6Bonding

7Electrolysis

8Groups of the Periodic Table

9The Atmosphere

10Reactivity Series

11Metal Extraction

12Acids & Alkalis

13Chemical Tests

14Physical Chemistry

15Organic Chemistry

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