Calculate the theoretical potential at 25°C needed to initiate the deposition of*(a) coppe...

Calculate the theoretical potential at 25°C needed to initiate the deposition of

*(a) copper from a solution that is 0.250 M in Cu2+ and buffered to a pH of 3.00. Oxygen is evolved at the anode at 1.00 atm.

(b) tin from a solution that is 0.220 M in Sn2+ and buffered to a pH of 4.00. Oxygen is evolved at the anode at 770 torr.

*(c) silver bromide on a silver anode from a solution that is 0.0964 M in Br- and buffered to a pH of 3.70. Hydrogen is evolved at the cathode at 765 torr.

(d) Tl2O3 from a solution that is 5.00 × 10-3 M in Tl1 and buffered to a pH of 7.50. The solution is also made 0.010 M in Cu2+, which acts as a cathode depolarizer for the process