DP Chemistry (last assessment 2024)
Question 19M.2.sl.TZ1.b(ii)
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.2.sl.TZ1.b(ii) |
| Level | sl | Paper | 2 | Time zone | TZ1 |
| Command term | Formulate | Question number | b(ii) | Adapted from | N/A |
b(ii).
[Maximum mark: 2]
19M.2.sl.TZ1.b(ii)
Benzoic acid, C6H5COOH, is another derivative of benzene.
Formulate the equation for the complete combustion of benzoic acid in oxygen using only integer coefficients.
[2]
Markscheme
2C6H5COOH(s) + 15O2 (g) → 14CO2 (g) + 6H2O(l)
correct products [✔]
correct balancing [✔]
Examiners report
Most students earned at least one mark for writing the correct products of the combustion of benzoic acid but the balancing appeared to be difficult for some.
