Calculate the cathode potential (versus S.C.E.) needed to reduce cobalt(II) to 1.0 M in each of the following solutions. In each case, Co(s) is the

Calculate the cathode potential (versus S.C.E.) needed to reduce cobalt(II) to 1.0 µM in each of the following solutions. In each case, Co(s) is the product of the reaction.

(a) 0.10 M HClO₄

(b) 0.10 M C₂O₄^2- (Find the potential at which [Co(C₂O₄)₂^2-] = 1.0 µM.)

(c) 0.10 M EDTA at pH 7.00 (Find the potential at which [Co(EDTA)^2-] = 1.0 µM.)

Co(C,04)3 + 2e = Co(s) + 2C,0 E = -0.474 V