The problem: complete the half reaction.
the answer manual gives the following:
+ 2 H+
+ 2 e-
that's dandy and all, but why on earth did the hydrogens bond to the C2
instead of just floating around like in the following reaction?
+ 14 H+
+ 7 H2
the methodology in the second one makes sense to me, but not the first one. what's the difference in the two? They're done in two completely different ways. And each different way produces a different answer.