1. I have to calculate the voltage of a standard cell with the following half-cell reactions: Ni(s) ---> Ni2+ + 2e- 2e- + Cl2(g) ---> 2Cl- 2. By the electrolysis of water, 11.2L of oxygen at STP was prepared a) What charge was required? b) If a current of 0.5A was used, how long did it take? Thanks for the help.