Cambridge IGCSE Chemistry · Syllabus 0620 · Stoichiometry
Percentage purity
What is Percentage purity?
Percentage purity is the mass of the pure target substance present in a sample divided by the total mass of that impure sample, multiplied by 100 per cent; the mass of the pure substance is usually found from reaction data.
This definition is part of the Stoichiometry chapter in Cambridge IGCSE Chemistry.