How do we represent the redox reaction between dichromate ion and ferrous ion stoichiometrically?

1 Answer
anor277
Sep 5, 2017

Cr_2O_7^(2-) +6Fe^(2+) + 14H^(+) rarr2Cr^(3+)+6Fe^(3+)+7H_2O(l)

Explanation:

"Reduction half-equation"

Cr_2O_7^(2-) +14H^(+) + 6e^(-) rarr2Cr^(3+)+7H_2O(l)

"Oxidation half-equation"

Fe^(2+) rarrFe^(3+)+e^(-)

And so we takes one of the former and six of the latter......

Cr_2O_7^(2-) +6Fe^(2+) + 14H^(+) rarr2Cr^(3+)+6Fe^(3+)+7H_2O(l)

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