Nelson Chemistry Chapter 12 Quiz
Click on the correct answer
1
Reduction is indicated by
a loss of electrons
a decrease in oxidation number
a positive ion getting a higher positive charge
2OH
-
(aq) + SO
2
(g) ------> SO
3
2-
(aq) + H
2
O(l)
2
A solution of acidified potassium permanganate is stored in an iron container. The net ionic equation for a reaction that occurs is
MnO
4
-
(aq) + 8H
+
(aq) + 5K(s) -----> Mn
2+
(aq) + 4H
2
O(l) + 5K
+
(aq)
2MnO
4
-
(aq) + 16H
+
(aq) + 5Fe(s) -----> 2Mn
2+
(aq) + 5Fe
2+
(aq) + 8H
2
O(l)
MnO
4
-
(aq) + 8H
+
(aq) + Fe
2+
(aq) ------> Mn
2+
(aq) + Fe
3+
(aq) + 4H
2
O(l)
MnO
4
-
(aq) + 8H
+
(aq) + Fe(s) -----> Mn
2+
(aq) + 4H
2
O(l) + Fe
2+
(aq)
3
In the half-reaction Al
3+
(aq) + 3e
-
----> Al(s), the aluminum ions are undergoing
oxidation
neutralization
electroysis
reduction
4
In the reaction 2Ag
+
(aq) + Cd(s) ------> Cd
2+
(aq) + 2Ag(s), the strongest oxidizing agent is
Ag
+
(aq)
Cd(s)
Cd
2+
(aq)
Ag(s)
5
Ir(s) + Tl
+
(aq) ------> no reaction
Ir
3+
(aq) + Re(s) ------> no reaction
3Tl
+
(aq) + Y(s) ------> 2Tl(s) + Y
3+
(aq)
In these reactions, the strongest oxidizing agent is
Tl
+
(aq)
Y
3+
(aq)
Ir
3+
(aq)
Re
3+
(aq)
6
Which reactants will result in a spontaneous reaction?
Fe
2+
(aq) + Pb
2+
(aq)
Cr
2+
(aq) + Zn
2+
(aq)
Sn
2+
(aq) + I
2
(s)
Na
+
(aq) + Pb(s)
7
Given the following spontaneous reactions,
X
2+
(aq) + Y(s) -----> X(s) + Y
2+
(aq)
X
2+
(aq) + Q(s) -----> X(s) + Q
2+
(aq)
Y
2+
(aq) + Z(s) -----> Y(s) + Z
2+
(aq)
Z
2+
(aq) + Q(s) ------> Z(s) + Q
2+
(aq)
the strongest oxidizing agent is
Q
2+
(aq)
Y
2+
(aq)
Z
2+
(aq)
X
2+
(aq)
8
The reducing agent capable of converting 1.0 mol/L Sn
4+
(aq) ions to Sn
2+
(aq) but not capable of converting 1.0 mol/L Sn
2+
(aq) to Sn(s) is
Pb(s)
Ni(s)
Cu(s)
Cr(s)
9
Using acidified 0.20 mol/L Cr
2
O
7
2-
(aq), a student titrated a solution of Sn(NO
3
)
2
(aq) of unknown concentration. In the titration, 34.0 mL of oxidizing agent were required to react with 43.0 mL of the reducing agent. What was the concentration of Sn(NO
3
)
2
(aq)?
0.17 mol/L
0.47 mol/L
0.53 mol/L
0.76 mol/L
10
In the methane-oxygen fuel cell reaction
CH
4
(g) + 2O
2
(g) -------> CO
2
(g) + 2H
2
O(g) E
o
= 1.05 V
oxidation numbers show that
oxygen atoms lose electrons
hydrogen atoms gain electrons
O
2
(g) is the reducing agent
carbon atoms lose electrons