DP Chemistry (first assessment 2025)
Question EXM.1B.HL.TZ0.1ci
| Date | May Example question | Marks available | [Maximum mark: 2] | Reference code | EXM.1B.HL.TZ0.1ci |
| Level | HL | Paper | 1B | Time zone | TZ0 |
| Command term | State | Question number | i | Adapted from | N/A |
i.
[Maximum mark: 2]
EXM.1B.HL.TZ0.1ci
(i)
The titration of Fe(II) with MnO4 in acid medium is a redox reaction. State the oxidised and reduced species, including their change in oxidation states.
Oxidised: ........................................................................................................................................
Reduced: ........................................................................................................................................
[2]
Markscheme
Oxidised: Fe+2 → Fe+3 ✔
Reduced: Mn7+ → Mn2+ ✔
Syllabus sections
Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.2—Electron transfer reactions » Reactivity 3.2.1—Oxidation and reduction can be described in terms of electron transfer, change in oxidation state, oxygen gain/loss or hydrogen loss/gain. Deduce oxidation states of an atom in a compound or an ion. Identify the oxidized and reduced species and the oxidizing and reducing agents in a chemical reaction.