Following the synthesis and recrystallisation of aspirin, the purified crystals were collected and weighed.
The theoretical yield of aspirin for this preparation was 1.25 g. The actual mass of the recovered product was 1.45 g.
This resulted in a percentage yield greater than 100%.
Calculate the percentage yield of this reaction.
157 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.