Question

Potassium dichromate oxidation state chhange after oxidation

Answer 1

In the dichromate ion, the oxidation number of chromium is+6.
The sum of the oxidation numbers in Cr2O7
2-
, a polyatomic ion, is -2, the charge of
the ion. We assign -2 as the oxidation number for each oxygen, and x as the
oxidation number of each chromium and write the following equation: 2x + 7(-2) = -
2… x = +6

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