Question 1
According to the balanced equation shown below, 4.00 moles of oxalic acid, H
2C
2O
4, reacts with ________ moles of permanganate, MnO
4-.
5 H
2C
2O
4(aq) + 2 MnO
4-(aq) + 6 H
+(aq) → 10 CO
2(g) + Mn
2+(aq) + 8 H
2O(l)
◦ 1.60
◦ 4.00
◦ 8.00
◦ 9.00
Question 2
Among the following reactions, find those that are redox reactions:
1) HOCl(aq) + NaOH(aq) → NaOCl(aq) + H
2O(l)
2) 5 I
-(aq) + IO
3-(aq) + 6 H
+(aq) → 3 I
2(s) + 3 H
2O(l)
3) 2NaCl(s) + H
2SO
4(aq) →2 HCl(g) + Na
2SO
4(s)
4) CaO(s) + H
2O(l)→ Ca(OH)
2(aq)
5) 2 H
2O
2(aq) → 2 H
2O(l) + O
2(g)
◦ reactions 1) and 3)
◦ reactions 1) and 5)
◦ reactions 2) and 4)
◦ reactions 2) and 5)
◦ reactions 3) and 4)