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Consider the following half-equation - VCE - SSCE Chemistry - Question 30 - 2020 - Paper 1
Question 30
Consider the following half-equation. ClO2(g) + e- ↔ ClO2-(aq) It is also known that: - ClO2(g) will oxidise HI(aq), but not HCl(aq). - Fe^2+(aq) will oxidise HI(a... show full transcript
Worked Solution & Example Answer:Consider the following half-equation - VCE - SSCE Chemistry - Question 30 - 2020 - Paper 1
Step 1
Based on the information given, which substances can Fe^2+(aq) be oxidised by?
Answer
To determine which substances can oxidise Fe^2+(aq), we assess the oxidation capabilities:
- ClO2(g) can oxidise HI(aq), which indicates it is a strong enough oxidiser to also oxidise Fe^2+(aq).
- ClO2-(aq) does not oxidise HI(aq), meaning it cannot oxidise Fe^2+(aq).
- I2(aq) is known to be a good oxidising agent and is capable of oxidising Fe^2+(aq).
With the information that:
- Fe^2+(aq) can be oxidised by ClO2(g) and I2(aq).
- ClO2(g) but not ClO2-(g) can oxidise HI(aq).
Therefore, the correct answer is option C: ClO2-(g) and ClO2(g), but not I2(aq).