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April 2, 2015

Homework Help: Chemistry - DrBob222

Posted by Alex on Wednesday, February 20, 2008 at 6:40pm.

CH3OH + MnO4- ----> Mn2+ + CH2O

Earlier I posted this question and then realized that CH3OH didn't have a charge. It changed my work because the oxidation state changed. Can you check if what I fixed is correct?

CH3OH- + MnO4- ----> Mn2+ + CH2O
1e-/C 5e-/Mn
x 5 x 1
= 5 = 5

5CH3OH + 1MnO4^- ----> Mn^2+ + CH2O

I now got a different coefficient for manganese. And now I need to balance it..


5CH3OH + 1MnO4^- ----> Mn^2+ + 5CH2O + 4H2O

I'm stuck. I know we have to add H+ ions to balance the H's but I don't know how much.

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