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Explain why, sulphur dioxide is a more p...

Explain why, sulphur dioxide is a more powerful reducing agent in the alkaline medium than in the acidic medium.

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`SO_(2) + 2 O overset (Ө) H rarr SO_(4) ^(2-) + 2 H^(oplus) + 2e^(Ө)`
In alkaline medium, the above reaction is shifted in forward direction due to the removal of the hydrogen ions , therefore, sulphur dioxide is a more powerful reducing agent in the alkaline medium than in acidic medium.
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