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Solved: Determining pH Using a Concentration CellA voltaic
Chapter , Problem 1PE(choose chapter or problem)
Problem 1PE
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 constructed from two hydrogen electrodes, both with PH2 = 1.00. One electrode is immersed in pure H2O and the other in 6.0 M hydrochloric acid. What is the emf generated by the cell and what is the identity of the electrode that is immersed in hydrochloric acid?
(a) -0.23 V, cathode, (b) 0.46 V, anode, , (c) 0.023 V, anode, , (d) 0.23 V, cathode, , (e) 0.23 V, anode.
Questions & Answers
QUESTION:
Problem 1PE
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 constructed from two hydrogen electrodes, both with PH2 = 1.00. One electrode is immersed in pure H2O and the other in 6.0 M hydrochloric acid. What is the emf generated by the cell and what is the identity of the electrode that is immersed in hydrochloric acid?
(a) -0.23 V, cathode, (b) 0.46 V, anode, , (c) 0.023 V, anode, , (d) 0.23 V, cathode, , (e) 0.23 V, anode.
ANSWER:
Problem 1PEDetermining pH Using a Concentration CellA 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 isobserved 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 solutionA concentration cell constructed from two hydrogen electrodes, both with PH2 = 1.00. Oneelectrode is immersed in pure H O and the other in 6.