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12.53 mL of 0.0509MSeO(2) reacted with 2...

`12.53 mL` of `0.0509MSeO_(2)` reacted with `25.52 mL 0.1M CrSO_(4)` solution. In the raeaction `Cr^(2+)` was oxidised to `Cr^(3+)`. To what oxidation state selenium was converted in the reaction? Write the redox change for `SeO_(2)`.

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