Question

( 2 )
(b) What is the oxidation number of Cr in Cr2o72-​

Answer 1

Answer:

There are seven oxygen atoms, so the total charge is −2⋅7=−14 . So, two chromium atoms have a total oxidation number of +12 . Since one is not more electronegative than the other, we can divide the number by two to get one chromium's oxidation number. So, a chromium atom here has an oxidation number of +6 .

Explanation:

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