Question 1
Determine the number of water molecules necessary to balance the reduction half reaction of

that occurs in an acidic solution.
◦ 5
◦ 7
◦ 3
◦ 1
Question 2
What is the oxidation half reaction in the following chemical reaction?
Mn(s) + 2 H+(aq) → Mn2+(aq) + H2(g)
◦ Mn
2+(
aq) + 2e
- → Mn(
s)
◦ Mn(
s) → Mn
2+(
aq) + 2e
-◦ H
2(
g) → 2 H
+(
aq) + 2e
-◦ 2 H
+(
aq) + 2e
- → H
2(
g)