Question 1
Disproportionation is a reaction in which a substance is both oxidized and reduced in the reaction. Which is a disproportionation reaction?
◦ ClO
3-(
aq) + 3 Cu(s) + 6 H
+(
aq) → Cl
-(
aq) + 3 Cu
2+(
aq) + 3 H
2O(
l)
◦ ClO
-(
aq) + Pb(OH)
4-(
aq) → Cl
-(
aq) + PbO
2(
s) + H
2O(
l) + 2 OH
-(
aq)
◦ Cl
2(
g) + 2 OH
-(
aq) → Cl
-(
aq) + ClO
-(
aq) + H
2O(
l)
◦ 6 Cl
-(
aq) + Cr
2O
72-(
aq) + 14 H
+(
aq) → 3 Cl
2(
g) + 2 Cr
3+(
aq) + 7 H
2O(
l)
Question 2
In the reaction 2 H
2O
2(
l) → 2 H
2O(
l) + O
2(
g) oxygen is
◦ both oxidized and reduced.
◦ neither oxidized nor reduced.
◦ only reduced.
◦ only oxidized.