Determine the oxidation number of the specified element.

Cr in CrO4$\displaystyle ^2-$

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- Mar 13th 2008, 08:49 AMjohettoxidation
Determine the oxidation number of the specified element.

Cr in CrO4$\displaystyle ^2-$ - Mar 13th 2008, 11:47 AMNacho
well this is not math xD

but I know the answer, I think that you mean:

$\displaystyle

CrO_4^{ - 2}

$

to answer this problem you must know that, the oxidation number of oxigen y -2, then we have this equation:

$\displaystyle

Cr + 4 \cdot - 2 = - 2 \Leftrightarrow \boxed{Cr = 6}

$