A Voltaic cell is set up such that, a copper electrode and 1.0 M Cu(NO3)2 solution are placed in one half-cell, and a silver electrode and 1.0 M AgNO3 solution in another half-cell. The two electrodes are connected to a voltmeter with copper wires, while the two half-cells are linked by a “salt-bridge” containing KNO3 to allow the flow of ions. The standard reduction potentials are as follows: Ag+(aq) + e– --> Ag(s); Eo = +0.80 V Cu2+(aq) + 2e– --> Cu(s); Eo = +0.34 V Which of the following statements is TRUE? (A) During the operation, electrons flow from the copper electrode to the silver electrode; (B) During the operation, electrons flow from the silver electrode to the copper electrode; (C) In the salt-bridge, K+ ion flows into the Cu-Cu(NO3)2 half-cell; (D) In this electrochemical process, silver metal is consumed and copper is produced.
A Voltaic cell is set up such that, a copper electrode and 1.0 M Cu(NO3)2 solution are placed in one half-cell, and a silver electrode and 1.0 M AgNO3 solution in another half-cell. The two electrodes are connected to a voltmeter with copper wires, while the two half-cells are linked by a “salt-bridge” containing KNO3 to allow the flow of ions. The standard reduction potentials are as follows:
Ag+(aq) + e– --> Ag(s); Eo = +0.80 V
Cu2+(aq) + 2e– --> Cu(s); Eo = +0.34 V
Which of the following statements is TRUE?
(A) During the operation, electrons flow from the copper electrode to the silver electrode;
(B) During the operation, electrons flow from the silver electrode to the copper electrode;
(C) In the salt-bridge, K+ ion flows into the Cu-Cu(NO3)2 half-cell;
(D) In this
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