An industrial chemist prepares a sample of hydrated ammonium iron(II) sulfate (Mohr's salt) from iron filings, sulfuric acid, and ammonium sulfate. After recrystallisation and drying, the percentage yield of the pure crystalline product is determined to be 74%74\%74%.
Give two reasons why the percentage yield of this purified crystalline product is less than 100%100\%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.