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The E° for the reaction of Cu/Cu2+ and Sn/Sn2+ is + 0.19 V. What is the value o…
Related Topics
Wize University Chemistry Textbook > Electrochemistry
Important Equations + Nonstandard conditions (Nernst Equation)
6 Activities
The E° for the reaction of Cu/Cu
2+
and Sn/Sn
2+
is + 0.19 V. What is the value of the equilibrium constant K for this reaction at 298 K?
3.7x10
-7
1.6x10
4
2.7x10
6
6.2x10
14
I don't know
Check Submission
More Important Equations + Nonstandard conditions (Nernst Equation) Questions:
A comproportionation reaction is a reaction where one element in two different oxidation states reacts to form a product where both atoms now have the same oxidation state. An electrochemical cell can be constructed using the comproportionation of cobalt as shown below.
C
O
3
+
+
C
O
+
→
2
C
O
2
+
CO^{3+}+CO^+ \to 2CO^{2+}
C
O
3
+
+
C
O
+
→
2
C
O
2
+
If the equilibrium constant for the above reaction is found to be 6.3 x 10
4
determine the standard cell potential ε
0
and draw the electrochemical cell in standard notation
Calculate the
standard voltage
and
write the standard cell notation
for a galvanic cell composed of the following two half reactions.
Fe
2+
+ 2e
-
--> Fe(s) E
o
=-0.41V
Cr
2
O
7
2-
+ 14H
+
+ 6e
-
→ 2Cr
3+
+ 7H
2
O E
o
=1.33V
Electrochemistry: Galvanic cells
For each galvanic cell, what is the value of the equilibrium constant for the reaction between each pair at 25 °C? Please ensure that your answer is specified to two decimal places and that your answer is formatted as follows: 9.15x10
25
for both answers.
Ni(s) and Ag
+
(aq)
Fe(s) and Cr
3+
(aq)
If you could increase the concentration of Cu
2+
, which of the following would be true about the cell potential?
You make a cell with a copper electrode in a solution of copper nitrate and a silver electrode in a solution of silver nitrate.
C
u
(
s
)
+
2
A
g
+
(
a
q
)
⇌
C
u
2
+
(
a
q
)
+
2
A
g
(
s
)
E
=
0.46
V
Cu(s)+2Ag^+(aq)⇌Cu^{2+}(aq)+2Ag(s)\ \ \ \ \ \ E = 0.46 V
C
u
(
s
)
+
2
A
g
+
(
a
q
)
⇌
C
u
2
+
(
a
q
)
+
2
A
g
(
s
)
E
=
0.46
V
If you could increase the concentration of Ag
+
, which of the following would be true about the cell potential?
Electrochemistry Additional Practice
At 25C, what is the potential of the following cell and what is the Keq?
Ni|Ni2+(aq)(0.010 M)||Cr-(0.20 M)|Cr2(g) | Pt
1) Is the reaction occuring in standard or non-standard conditions?
Gibbs Free Energy and Voltage Practice Problem #1
What is the equilibrium constant for the reaction of copper metal with bromine to form copper(II) ions and bromide ions in aqueous solution at 25
o
C?
C
u
(
a
q
)
2
+
+
2
e
−
→
C
u
(
s
)
E
o
=
+
0.34
V
B
r
2
(
a
q
)
+
2
e
−
→
2
B
r
(
a
q
)
−
E
o
=
+
1.07
V
\begin{array}{cc} Cu^{2+}_{(aq)}+2e^- \rightarrow Cu_{(s)} & E^o=+0.34\ V\\ Br_{2(aq)}+2e^- \rightarrow 2\ Br^-_{(aq)} & E^o=+1.07\ V \end{array}
C
u
(
a
q
)
2
+
+
2
e
−
→
C
u
(
s
)
B
r
2
(
a
q
)
+
2
e
−
→
2
B
r
(
a
q
)
−
E
o
=
+
0.34
V
E
o
=
+
1.07
V