(a) (4 pts) consider the voltaic cell based on the following half-reactions: aus*(aq) + 3e + au(s) tl(aq) + 3e → ti() ered = 1.50 v ered = -0.34 v calculate ecell at 25°c when (au-] = 1.5 x 10-2 mand (tv4) 2.8 x 10-m. ecell = (b) (2 pts) in the commercial preparation of aluminum, aluminum oxide, al2o3, is electrolyzed at 1000°c. (the mineral cryolite is also present as a solvent.) assume that the reaction at the cathode is: al3+ + 3 e al if the electrolytic cell employs a current of 5.00 a, how many days will it take to produce 5.12 kg of aluminum? time required =