Key term for Edexcel GCSE Chemistry, used in Separating and Purifying Substances.
A measure of the proportion of a pure substance in a sample, calculated by (Mass of pure / Total mass) × 100.
Percentage purity appears in Edexcel GCSE Chemistry revision content for States of Matter and Mixtures, especially Separating and Purifying Substances and Interpretation of Melting Point Data.
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