Permanganate can be used to oxidize oxalic acid all the way to carbon dioxide. I

Question

Permanganate can be used to oxidize oxalic acid all the way to carbon dioxide. If you balance this redox reaction in acidic solution, which of the following statements about the balanced reaction is not true?

MnO4??(aq) + H2C2O4(aq) ? Mn2+?(aq) + CO2(aq)


a)The oxidation state of Mn changes from +7 to +2.
b)10 equivalents of CO2 are produced.
c)16 equivalents of H?+ are required.
d)Each equivalent of MnO4? will react with 5 equivalents of oxalic acid.

Explanation / Answer

H2C2O4 ----> 2CO2 + 2H+ + 2e- (MnO4)- + 8H+ + 5e- ----> Mn2+ + 4H2O 5 H2C2O4 + 2 (MnO4)- + 6 H+ ----> 10 CO2 + 2 Mn2+ + 8H2O d)Each equivalent of MnO4- will react with 5 equivalents of oxalic acid. 2 equivalent of MnO4- will react with 5 equivalents of oxalic acid.

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