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.)
a) In the external circuit, electrons flow from the other compartment to the Cu2+|Cu compartment.
b) Cl2|Cl- could be the other standard half cell.
c) The cathode reaction is Cu2+ + 2e- -> Cu
d) The cathode reaction is Cu -> Cu2+ + 2e-
e) Cr3+|Cr could be the other standard half cell.
- hcbiochemLv 71 year agoFavorite Answer
Because the question asks for all that are correct,
A is correct because the cathode is the site of reduction which requires the input of electrons.
C is correct because Cu2+ + 2 e- --> Cu is a reduction
E is also correct. The oxidation of Cr --> Cr3+ + 3 e- coupled with the reduction of Cu2+ to Cu(s) will give a cell a positive voltage.
- 1 year ago
The answer is A
- bee killerLv 71 year ago
The cathode is where reduction takes place. Which is choice C