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Identify the following half -reactions a...

Identify the following half -reactions as oxidantion half-reactions and reduction half -reactions :
`Cr_(2)O_(7)^(2-)to2Cr^(3+)`

Text Solution

Verified by Experts

`overset(+6)Cr_(2)overset(-2)O_(7)tooverset(+3)2Cr.`The oxidation number of Cr changes from +6 to +3 .This indicates that the reaction involves reduction of `Cr_(2)O_(7)^(2-)`.Hence, it is a reduction half rea ction
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