For the following half-reactions, answer these questions. Ce 4 + ( a q ) + e − → Ce 3 + ( a q ) E ° = + 1.61 V Ag + ( a q ) + e − → Ag ( s ) E ° = + 0.80 V Hg 2 2 + ( a q ) + 2 e − → 2 Hg ( l ) E ° = + 0.80 V Sn 2 + ( a q ) + 2 e − → Sn ( s ) E ° = − 0.14 V Ni 2 + ( a q ) + 2 e − → Ni ( s ) E ° = − 0.24 V Al 3 + ( a q ) + 3 e − → Al ( s ) E ° = − 1.68 V (a) Which is the weakest oxidizing agent? (b) Which is the strongest oxidizing agent? (c) Which is the strongest reducing agent? (d) Which is the weakest reducing agent? (e) Will Sn( s ) reduce Ag + ( aq ) to Ag( s )? (f) Will Hg( l ) reduce Sn 2 + ( aq ) to Sn( s )? (g) Which ion( s ) can be reduced by Sn( s )? (h) Which metal( s ) can be oxidized by Ag + ( aq )?
For the following half-reactions, answer these questions. Ce 4 + ( a q ) + e − → Ce 3 + ( a q ) E ° = + 1.61 V Ag + ( a q ) + e − → Ag ( s ) E ° = + 0.80 V Hg 2 2 + ( a q ) + 2 e − → 2 Hg ( l ) E ° = + 0.80 V Sn 2 + ( a q ) + 2 e − → Sn ( s ) E ° = − 0.14 V Ni 2 + ( a q ) + 2 e − → Ni ( s ) E ° = − 0.24 V Al 3 + ( a q ) + 3 e − → Al ( s ) E ° = − 1.68 V (a) Which is the weakest oxidizing agent? (b) Which is the strongest oxidizing agent? (c) Which is the strongest reducing agent? (d) Which is the weakest reducing agent? (e) Will Sn( s ) reduce Ag + ( aq ) to Ag( s )? (f) Will Hg( l ) reduce Sn 2 + ( aq ) to Sn( s )? (g) Which ion( s ) can be reduced by Sn( s )? (h) Which metal( s ) can be oxidized by Ag + ( aq )?
Solution Summary: The author explains that the weakest oxidizing agent needs to be identified by comparing the standard reduction potential of different half reactions.
For the following half-reactions, answer these questions.
Ce
4
+
(
a
q
)
+
e
−
→
Ce
3
+
(
a
q
)
E
°
=
+
1.61
V
Ag
+
(
a
q
)
+
e
−
→
Ag
(
s
)
E
°
=
+
0.80
V
Hg
2
2
+
(
a
q
)
+
2
e
−
→
2
Hg
(
l
)
E
°
=
+
0.80
V
Sn
2
+
(
a
q
)
+
2
e
−
→
Sn
(
s
)
E
°
=
−
0.14
V
Ni
2
+
(
a
q
)
+
2
e
−
→
Ni
(
s
)
E
°
=
−
0.24
V
Al
3
+
(
a
q
)
+
3
e
−
→
Al
(
s
)
E
°
=
−
1.68
V
(a) Which is the weakest oxidizing agent? (b) Which is the strongest oxidizing agent? (c) Which is the strongest reducing agent? (d) Which is the weakest reducing agent? (e) Will Sn(s) reduce Ag+(aq) to Ag(s)? (f) Will Hg(l) reduce Sn2+(aq) to Sn(s)? (g) Which ion(s) can be reduced by Sn(s)? (h) Which metal(s) can be oxidized by Ag+(aq)?
In the following reaction, what quantity in moles of CH₃OH are required to give off 4111 kJ of heat? 2 CH₃OH (l) + 3 O₂ (g) → 2 CO₂ (g) + 4 H₂O(g) ∆H° = -1280. kJ
Indicate the processes in the dismutation of Cu2O.
1. Consider these three reactions as the elementary steps in the mechanism for a chemical reaction.
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
Potential Energy (kJ)
600
400
200
0
-200-
-400
-600-
-800
(i) Cl₂ (g) + Pt(s) → 2Cl (g) + Pt(s)
(ii) Cl (g)+ CO (g) + Pt (s) → CICO (g) + Pt (s)
Ea = 1550 kJ
Ea = 2240 kJ
(iii) Cl (g) + CICO (g) → Cl₂CO (g)
Ea
= 2350 kJ
AH=-950 kJ
ΔΗ = 575 ΚΙ
AH=-825 kJ
a. Draw the potential energy diagram for the reaction. Label the data points for clarity.
The potential energy of the reactants is 600 kJ
Reaction Progress
b. What is the overall chemical equation?
c. What is the overall change in enthalpy for the above chemical reaction?
d. What is the overall amount of activation energy for the above chemical reaction?
e. Which reaction intermediate would be considered a catalyst (if any) and why?
f. If you were to add 2700kJ of energy to the reaction (e.g. 2700 kl of heat or electricity), would
you be able to make the reaction reverse itself (i.e. have…
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell