Question 1
Balance the following oxidation-reduction reaction in acid solution:
Fe(s) → Fe
2+ + H
2(g)
The sum of the coefficients is ________.
◦ 2
◦ 5
◦ 8
◦ 7
◦ 9
Question 2
Balance the following oxidation-reduction reaction in acid solution:
MnO
4-(aq) + H
2C
2O
4(aq) → Mn
2+(aq) + CO
2(g) + H
2O(l)
The sum of the coefficients is ________.
◦ 25
◦ 47
◦ 33
◦ 18
◦ 21