A manufacturer is choosing between two pathways for making product R. The manufacturer prioritises sustainable raw materials and minimising waste. The same product can be made by either pathway. The table shows information about the two pathways.
| Pathway A | Pathway B | |
|---|---|---|
| Percentage yield (%) | 81 | 67 |
| Atom economy (%) | 64 | 94 |
| Raw material | renewable resource | finite resource |
| By-product | can be sold | must be treated |
Explain which pathway the manufacturer should choose.
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.