During the industrial scale-up of a pharmaceutical synthesis, such as the production of aspirin from salicylic acid and acetic anhydride, chemical engineers routinely find that the actual yield of the purified active ingredient is significantly lower than the calculated theoretical yield.
State two distinct chemical or practical reasons why the percentage yield of a chemical preparation is typically less than 100%.
Practise Edexcel GCSE Chemistry Quantitative analysis with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.