阿摩線上測驗
4. A strip of copper is placed in a 1 M solution of copper nitrate, and a strip of silver is placed in a 1 M solution of silver nitrate. The two metal strips are connected to a voltmeter by wires, and a salt bridge connects the solutions. The following standard reduction potentials apply:
Ag+(aq) + e- → Ag(s) E° = +0.80 V Cu2+(aq) + 2e- → Cu(s) E° = +0.34 V
When the voltmeter is removed and the two electrodes are connected by a wire, which of the following does .not. take place?
(A) Negative ions pass through the salt bridge from the silver half-cell to the copper half-cell.
(B) Some positive copper ions pass through the salt bridge from the copper half-cell to the silver half-cell.
(C) The silver electrode increases in mass as the cell operates.
(D) Electrons flow in the external circuit from the copper electrode to the silver electrode.
(E) There is a net general movement of silver ions through the salt bridge to the copper half-cell.
(A) Negative ions pass through the salt bridge from the silver half-cell to the copper half-cell.
(B) Some positive copper ions pass through the salt bridge from the copper half-cell to the silver half-cell.
(C) The silver electrode increases in mass as the cell operates.
(D) Electrons flow in the external circuit from the copper electrode to the silver electrode.
(E) There is a net general movement of silver ions through the salt bridge to the copper half-cell.
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統計： A(0), B(2), C(0), D(0), E(1) #3252546
統計： A(0), B(2), C(0), D(0), E(1) #3252546
