DP Chemistry (first assessment 2025)
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)
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) ✔
Syllabus sections
Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.2—Electron transfer reactions » Reactivity 3.2.2—Half-equations separate the processes of oxidation and reduction, showing the loss or gain of electrons. Deduce redox half-equations and equations in acidic or neutral solutions.