Textbook 6L.7b [ENDORSED]

[Megan Chan 3A]

Write the half-reactions and devise a galvanic cell (write a cell diagram) to study each of the following reactions:

b) H+(aq) + OH−(aq) → H2O(l),the Brønsted neutralization reaction

The solution manual shows that the half reactions for this are
O2(g) + 4H+(aq) + 4e- → 2H2O(l)
O2(g) +2H2O(l) + 4e- → 4OH-(aq)

However I wrote these half reactions, which still ends up equal to the overall reaction after flipping the bottom one, but would this be incorrect?
2H+(aq) +2e- → H2(g)
2H2O(l) + 2e- → H2(g) + OH-(aq)

[Chem_Mod]

Your reaction is not balanced.

[Arya Adibi 1K]

Your second reaction is not balanced correctly.