Answer: Determining pH Using a Concentration CellA voltaic
Chapter , Problem 2PE(choose chapter or problem)
Problem 2PE
Determining pH Using a Concentration Cell
A voltaic cell is constructed with two hydrogen electrodes. Electrode 1 has PH2 = 1.00 atm and an unknown concentration of H+(aq). Electrode 2 is a standard hydrogen electrode (PH2 = 1.00 atm, [H+] = 1.00 M). At 298 K the measured cell potential is 0.211 V, and the electrical current is observed to flow from electrode 1 through the external circuit to electrode 2. Calculate [H+] for the solution at electrode 1. What is the pH of the solution?
A concentration cell is constructed with two Zn(s)-Zn2+(aq) half-cells. In one half-cell [Zn2+] = 1.35 M, and in the other [Zn2+] = 3.75 × 10-4 M.
(a) Which half-cell is the anode? , (b) What is the emf of the cell?
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