Question

Balance the following equation: 5. pur Tsa-1 य KCI KSO, + HO Cl + KS,O, + KOH For the reaction in question 5, list those elements which have changed oxidation number during the reaction, showing the oxidation number before and after the reaction. Which element is oxidized? Which is reduced? Which is the oxidizing agent? Which is the reducing agent? How many electrons are transferred per sulfur atom? How many totally in the reaction as shown? 6.

Answer 1

5) The general balanced equation from the above question

(4)Cl₂ + (10)KOH + K₂S₂O₃ $\rightarrow$ (5)H₂O + (8)KCl + (2)K₂SO₄

6) Oxidizing and reducing agents from the above-balanced equation:

Oxidizing agents: Cl₂, O₂, K⁺

Reducing agents: K, Cl, H2, Sulphate (IV) $\rightarrow$ Sulphate (VI); SO₃^2-$\rightarrow$ SO₄^2-

Only one sulphur atom transferred during the reaction.

7) For the basic solution, the equation is already balanced.

MnO₄ + ClO₂$\rightarrow$ MnO₂ + ClO₄

Here, the oxidizing agent is MnO₄ and the reducing agent is ClO₂

For the acidic solution, the balanced reaction is:

KClO₃ + 6 HBr → KCl + 3 H₂O+ 3 Br₂

Here the oxidizing agent is KClO₃ and thereducing agent is HBr