Question

How does acidic potassium permanent react with (1) ferrous sulphate and (2) SO2 .
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Answer 1

Answer:

When potassium permanganate is added to acidulated solution of ferrous sulphate. (A) Potassium ion is reduced. ... In redox reactions, oxidation and reduction take place simultaneously. In this type of reaction, one species gets oxidised and the other gets reduced.

Acidified potassium permanganate oxidizes SO2 to sulphuric acid.

Explanation:

Answer 2

Acidic potassium permanent react with

(1) ferrous sulphate as $\[2KMn{O_4} + 8{H_2}S{O_4} + 10FeS{O_4} \to {K_2}S{O_4} + 5F{e_2}{(S{O_4})_3} + 2MnS{O_4} + 8{H_2}O\]$

(2) $\[S{O_2}\]$ as  $\[2KMnO{ & _4} + 5S{O_2} + 2{H_2}O \to {K_2}S{O_4} + 2MnS{O_4} + 2{H_2}S{O_4}\]$

Explanation:

• When acidified potassium permanganate reacts with ferrous sulphate, it forms potassium sulphate, ferric sulphate, manganese sulphate and water.
• The reaction can be given as:

   $\[2KMn{O_4} + 8{H_2}S{O_4} + 10FeS{O_4} \to {K_2}S{O_4} + 5F{e_2}{(S{O_4})_3} + 2MnS{O_4} + 8{H_2}O\]$

• When acidified potassium permanganate reacts with sulphur dioxide, it forms potassium sulphate, manganese sulphate and sulphuric acid.
• The reaction is given as:

    $\[2KMnO{ & _4} + 5S{O_2} + 2{H_2}O \to {K_2}S{O_4} + 2MnS{O_4} + 2{H_2}S{O_4}\]$