DP Chemistry (last assessment 2024)
Question 21M.2.sl.TZ1.d(ii)
| Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.2.sl.TZ1.d(ii) |
| Level | sl | Paper | 2 | Time zone | TZ1 |
| Command term | Deduce | Question number | d(ii) | Adapted from | N/A |
d(ii).
[Maximum mark: 1]
21M.2.sl.TZ1.d(ii)
Magnetite, Fe3O4, is another ore of iron that contains both Fe2+ and Fe3+.
In acidic solution, hydrogen peroxide, H2O2, will oxidize Fe2+.
Fe2+ (aq) → Fe3+ (aq) + e−
Deduce a balanced equation for the oxidation of Fe2+ by acidified hydrogen peroxide.
[1]
Markscheme
H2O2(aq) + 2H+(aq) + 2Fe2+(aq) → 2H2O(l) + 2Fe3+(aq) ✔
