The following reaction occurs spontaneously.
2Al(s) + 6H+(aq) → 2Al3+(aq) + 3H2(g)
Write the balanced oxidation half-reaction.
1. Al(s) → Al3+(aq) + 3e-
2. Al3+(aq) + 3e- --> Al(s)
3. H2(g) --> 2H+(aq) + 2e-
4. 2H+(aq) + 2e- --> H2(g)
5. 2H+(aq) --> H2(g) + 2e-