The standard reduction potentials for Ni2+ and Cr₂O72- are as follows: Ni2+ (aq) + 2 e → Ni(s) Cr₂O7²- (aq) + 14 H+ + 3 e→→ 2 Cr³+ (aq) + 7 H₂O Eº = -0.23 V Eº = 1.33 V a. Find Eºcell at 25°C for the reaction: 3 Ni (s) + 2 Cr₂O72- (aq) + 28 H*(aq) → 3 Ni²+ (aq) +4 Cr³+ (aq) + 14 H₂O(1) b. Find Ecell at 25°C when [Cr₂O72-] = 2.00 M, [H+] = 1.00 M, and [Ni²+] = [Cr³+] = 0.010 M. c. Calculate the equilibrium constant (K) at 25°C for the reaction: 3 Ni (s) + 2 Cr₂O72- (aq) + 28 H*(aq) → 3 Ni²+ (aq) + 4 Cr³+(aq) + 14 H₂O (1) d. Would raising the pH from 0.00 (the value in part b) to 4.00 increase or decrease the voltage produced by this cell the
The standard reduction potentials for Ni2+ and Cr₂O72- are as follows: Ni2+ (aq) + 2 e → Ni(s) Cr₂O7²- (aq) + 14 H+ + 3 e→→ 2 Cr³+ (aq) + 7 H₂O Eº = -0.23 V Eº = 1.33 V a. Find Eºcell at 25°C for the reaction: 3 Ni (s) + 2 Cr₂O72- (aq) + 28 H*(aq) → 3 Ni²+ (aq) +4 Cr³+ (aq) + 14 H₂O(1) b. Find Ecell at 25°C when [Cr₂O72-] = 2.00 M, [H+] = 1.00 M, and [Ni²+] = [Cr³+] = 0.010 M. c. Calculate the equilibrium constant (K) at 25°C for the reaction: 3 Ni (s) + 2 Cr₂O72- (aq) + 28 H*(aq) → 3 Ni²+ (aq) + 4 Cr³+(aq) + 14 H₂O (1) d. Would raising the pH from 0.00 (the value in part b) to 4.00 increase or decrease the voltage produced by this cell the
Chemistry
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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![3.
The standard reduction potentials for Ni2+ and Cr₂O72- are as follows:
Ni2+
+ 2 e-→ Ni(s)
(aq)
Cr₂O7²- (aq) + 14 H+ + 3 e-
→ 2 Cr³+ (aq) + 7 H₂O
Eº = -0.23 V
Eº = 1.33 V
a. Find Eºcell at 25°C for the reaction:
3 Ni (s) + 2 Cr₂O7²- (aq) + 28 H*(aq) → 3 Ni²+(
(aq) +4 Cr³+ (aq) + 14 H₂O(1)
b. Find Ecell at 25°C when [Cr₂O72-] = 2.00 M, [H+] = 1.00 M, and [Ni²+] = [Cr³+] = 0.010 M.
c. Calculate the equilibrium constant (K) at 25°C for the reaction:
3 Ni (s) + 2 Cr₂O72- (aq) + 28 H*(aq) → 3 Ni²+ (aq) + 4 Cr³+ (aq) + 14 H₂O(1)
d. Would raising the pH from 0.00 (the value in part b) to 4.00 increase or decrease the voltage
produced by this cell](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb81558ef-0edc-4b96-8c9b-c81d5284a907%2Feecfd642-41c7-487e-b724-8dde08160781%2F3oaxb9_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3.
The standard reduction potentials for Ni2+ and Cr₂O72- are as follows:
Ni2+
+ 2 e-→ Ni(s)
(aq)
Cr₂O7²- (aq) + 14 H+ + 3 e-
→ 2 Cr³+ (aq) + 7 H₂O
Eº = -0.23 V
Eº = 1.33 V
a. Find Eºcell at 25°C for the reaction:
3 Ni (s) + 2 Cr₂O7²- (aq) + 28 H*(aq) → 3 Ni²+(
(aq) +4 Cr³+ (aq) + 14 H₂O(1)
b. Find Ecell at 25°C when [Cr₂O72-] = 2.00 M, [H+] = 1.00 M, and [Ni²+] = [Cr³+] = 0.010 M.
c. Calculate the equilibrium constant (K) at 25°C for the reaction:
3 Ni (s) + 2 Cr₂O72- (aq) + 28 H*(aq) → 3 Ni²+ (aq) + 4 Cr³+ (aq) + 14 H₂O(1)
d. Would raising the pH from 0.00 (the value in part b) to 4.00 increase or decrease the voltage
produced by this cell
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