What happens when so2 is passed through acidified K2Cr2O7?
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When Sulphur dioxide is passed through an acidified K2Cr2O7 solution ,the oxidation state of sulphur changes to (3) +4 to +6. ... (Cr2O4) -2 {valency is -2} is used as K2Cr2O7. The half reaction which is also the oxidation reaction is performed.
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