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Balance the following equation by oxidat...

Balance the following equation by oxidation number method.
`Fe^(+2) + Cr_(2)O_(7)^(-2) + H^(+) rarr Fe^(+3) + Cr^(+3) + H_(2)O`.

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Step - I balance the total loss and gain of electrons
`6 Fe^(+2) + Cr_(2) O_(7)^(-2) + H^(+) rarr 6 Fe^(+3) + 2Cr^(+3) + H_(2)O`
Step - II balance the hydrogen and oxygen on both side
`underset("(balanced redox equation)")(6Fe^(+2) + Cr_(2) O_(7)^(-2) + 14 H^(+)) rarr 6Fe^(+3) + 2Cr^(+3) + 7H_(2)O`
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