A student prepares a dye in the laboratory.
| Quantity | Value |
|---|---|
| Total mass of reactants | 12.0 g |
| Atom economy | 62.5% |
| Percentage yield | 88.0% |
No reactant remains after the reaction. The percentage yield is less than 100% only because some of the dye is lost when it is purified.
The student discards the waste products and the dye lost during purification.
Calculate the total mass of material discarded.
Give your answer in grams.
152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.