A standard galvanic cell is constructed in which a Cu 2+ | Cu + half cell acts a
ID: 691984 • Letter: A
Question
A standard galvanic cell is constructed in which a Cu2+ | Cu+ half cell acts as the cathode. Which of the following statements are correct?
Hint: Refer to a table of standard reduction potentials.
(Choose all that apply.)
As the cell runs, anions will migrate from the Cu2+|Cu+ compartment to the other compartment.
Cu+ is oxidized at the cathode.
The anode compartment could be Ag+|Ag.
The anode reaction could be Fe -> Fe2+ + 2e-.
In the external circuit, electrons flow from the Cu2+|Cu+ compartment to the other compartment.
Explanation / Answer
a)
As the cell runs, anions will migrate from the Cu2+|Cu+ compartment to the other compartment. false, as it runs, positive charge is decreased, so we must decrease negative charge as well
Cu+ is oxidized at the cathode. false, oxidation is not carried in the cathode, but anode
The anode compartment could be Ag+|Ag. False, since Ag has highe rpotential than Cu2/cu+ pair.
The anode reaction could be Fe -> Fe2+ + 2e-.True, since it has lower reduction potential.
In the external circuit, electrons flow from the Cu2+|Cu+ compartment to the other compartment false, electrons flow from out into Cu2´to form Cu+
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