Question 9

MnO₄ (aq) + H⁺(aq) + H₂S(g) → Mn²⁺(aq) + S(s) + H₂O(ℓ)

9.1 Define reduction in terms of oxidation numbers. (2)

9.2 Determine the oxidation number of manganese in the permanganate ion. (1)

9.3 Write down the FORMULA of the substance that undergoes oxidation. (1)

9.4 Explain the answer to QUESTION 9.3 in terms of oxidation numbers. (2)

9.5 Write down the FORMULA for the oxidising agent. (1)

9.6 Write down the oxidation half-reaction. (2)

9.7 Use the ion-electron method and write down the balanced net ionic equation. (3)

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