Ethanol is made by fermentation.
C6H12O6→2C2H5OH+2CO2 \mathrm{C_{6}H_{12}O_{6} \rightarrow 2C_{2}H_{5}OH + 2CO_{2}} C6H12O6→2C2H5OH+2CO2The batch record is shown in the table.
| Measurement | Value |
|---|---|
| Mass of glucose added | 18.0 kg |
| Percentage yield of ethanol | 62.5% |
Relative formula mass (MrM_rMr): glucose = 180.0, ethanol = 46.0
What is the mass of ethanol collected?
2.88 kg
9.20 kg
5.75 kg
11.3 kg
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.