a dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution the light purple colour of the solution fades and finally disappears which of the following is the correct explanation for the observation

A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observati

(a) KMnO4 is an oxidising agent, it oxidises FeSO4 (b) FeSO4 acts as an oxidising agent and oxidises KMnO4 (c) The colour disappears due to dilution, no reaction is involved (d) KMnO4 is an unstable compound and decomposes in the presence of FeSO4 to a colourless compound

Answer Follow Report

Soham ghosh

EXCELLENCE IS THE KEY TO SUCCESS

Friday, 27 November 2020 07:51 AM

Potassium permanganate

(K M n O_{4})

in presence of dil

H_{2} S O_{4}

, i.e.,in acidic medium acts as strong oxidising agent. In acidic medium,

K M n O_{4}

oxidises ferrous sulphate to ferric sulphate.

2 K M n O_{4} + 8 H_{2} S O_{4} + \underset{sulphate}{\underset{Ferrous}{10 F e S O_{4}}} \to K_{2} S O_{4} + \underset{sulphate}{\underset{Ferric}{5 F e_{2} {(S O_{4})}_{3}}} + 2 M n S O_{4} + 8 H_{4} O

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