In a galvanic cell based on the half reactions Ni²⁺(aq) + 2e⁻ → Ni(s) E° = -0.250 V 2H⁺(aq) + 2e⁻ → H₂ E° = 0.000 V the nickel compartment contains a nickel electrode in a solution where [Ni²⁺] = 1.00 × 10⁻² M, and the hydrogen compartment contains a platinum electrode, P_H₂ = 1.00 atm, and a weak acid, HA, at an initial concentration of 1.00 M. If the observed cell potential is 0.145 V at 25°C, calculate the Ka value for the weak acid.
In a galvanic cell based on the half reactions Ni²⁺(aq) + 2e⁻ → Ni(s) E° = -0.250 V 2H⁺(aq) + 2e⁻ → H₂ E° = 0.000 V the nickel compartment contains a nickel electrode in a solution where [Ni²⁺] = 1.00 × 10⁻² M, and the hydrogen compartment contains a platinum electrode, P_H₂ = 1.00 atm, and a weak acid, HA, at an initial concentration of 1.00 M. If the observed cell potential is 0.145 V at 25°C, calculate the Ka value for the weak acid.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter18: Electrochemistry
Section: Chapter Questions
Problem 159MP: A galvanic cell is based on the following half-reactions: In this cell, the copper compartment...
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In a galvanic cell based on the half reactions Ni²⁺(aq) + 2e⁻ → Ni(s) E° = -0.250 V 2H⁺(aq) + 2e⁻ → H₂ E° = 0.000 V the nickel compartment contains a nickel electrode in a solution where [Ni²⁺] = 1.00 × 10⁻² M, and the hydrogen compartment contains a platinum electrode, P_H₂ = 1.00 atm, and a weak acid, HA, at an initial concentration of 1.00 M. If the observed cell potential is 0.145 V at 25°C, calculate the Ka value for the weak acid.
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