Calculate the theoretical tendency of zinc to corrode (in volts) with evolution of hydrogen when immersed in 0.01 M ZnCl2 acidified to pH = 2. Calculate the theoretical tendency for nickel to corrode (in volts) in deaer- ated water of pH=7. Assume that the corrosion products are H₂ and Ni(OH)2, the solubility product of which is 1.6 x 10-16, (a) What is the emf of a cell made up of a copper electrode and a hydrogen electrode (PH₂ = 2 atm) in copper sulfate (activity Cu2+= 1) of pH = 1? (b) What is the polarity of the cell and which electrode is anode?