Question about the following reaction.?

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Question about the following reaction.?

Cr + CrO4 -> Cr(OH)3

Why/how is hydroxide formed in this reaction? Is it because you need hydrogens to add positive charge so that Cr can maintain its +3 oxidation state? Thank you for any help.

2007-10-24 13:30:22 · 1 answers · asked by anovelidea24 3 in Science & Mathematics ➔ Chemistry

1 answers

The reaction runs in water, in the presence of acid, H+, or base, OH-. It would be best to balance it as two half-reactions:

Cr ===> Cr(OH)3 + 3e-

CrO4= + 3e- ===> Cr(OH)3

2007-10-24 13:36:38 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋