DP Chemistry (last assessment 2024)
Question 18M.3.hl.TZ2.27a
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.3.hl.TZ2.27a |
| Level | hl | Paper | 3 | Time zone | TZ2 |
| Command term | Formulate | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 1]
18M.3.hl.TZ2.27a
Ethanol can be detected by a variety of instruments.
(a)
Fuel cells use an electrochemical process to determine the concentration of ethanol.
Formulate the overall equation for this process.
[1]
Markscheme
C2H5OH(g) + O2(g) → CH3COOH(aq) + H2O(l)
Accept any correct formula for reactants and products.
[1 mark]
