A student synthesizes a sample of potassium trioxalatoferrate(III) trihydrate crystals, K3[Fe(C2O4)3]⋅3H2O\text{K}_3[\text{Fe}(\text{C}_2\text{O}_4)_3] \cdot 3\text{H}_2\text{O}K3[Fe(C2O4)3]⋅3H2O. After isolating the crystals via filtration and washing them, the student weighs the product and finds that the actual mass obtained is greater than the calculated maximum theoretical yield.
Suggest one chemical reason for this discrepancy.
258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.