[Rutherford]

Could someone tell me in which molar ration do HCOOH and the silver from Tollens' react? For the aldehydes it is 1:2, as RCHO/RCOOH exchanges 2e^- and Ag⁺/Ag exchanges 1e^-. I think that in this case it should be 1:1, as the oxidation state of C in formic acid is +2 so only one electron will be released.
What about HCHO? Will it react with in the ration 1:3?

[Borek]

What are the final products? Have you tried to simply balance the reaction equation by half reaction method?

[Babcock_Hall]

The half-reaction method is obviously powerful.  However, I sometimes find in organic and biochemistry, one can take a simplified approach and assign oxidation numbers to carbon by O.N(C) = (# of bonds to O, N, or other electronegative atom) - (# of bonds to H).

[Rutherford]

The problem was that I had in my mind an acid product with oxidation number +3  .
Yes, I was talking about the simplified approach.
Thanks for the help.