1. Which response lists all of the following reactions that are spontaneous under standard electrochemical conditions?
Cr(s) + 3Fe3+ → 3Fe2+ + Cr3+
2Fe2+ + Cu2+ → 2Fe3+ + Cu
Li(s) + H+ → Li+ + H2 (g)
II and III
I and III
2. Which of the following is not a feature of the Nickel − Cadmium (Nicad) Cell?
The Nicad cell is a very common secondary cell.
Nickel is oxidized at the anode.
The Nicad cell has a limited number of recharge cycles.
NiO2 is reduced at the cathode.
During discharge, the solid reaction products adhere to the electrodes, allowing the cell to be recharged.
3.Calculate the standard cell potential for the cell, Cd|Cd2+(1 M)||Cu2+(1 M)|Cu.
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