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Based on the sign of e°cell, classify these reactions as product favored or reactant favored as written. assume standard conditions. use these data.

Timothy Norman

in Chemistry

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Eric Morgan on March 15, 2018

I have notice that this problem does not provide the data to be used in its resolution. But I've encountered the same problem and found the data to be used in the classification. This are the following Ni^2+ (aq) + S^2- (aq) ----> + Ni (s) S (s) Pb^2+ (aq) +H2 (g) ----> Pb (s) +2H^+ (aq) 2Ag^+ (aq) + Cr(s) ---> 2 Ag (s) +Cr^2+ (aq) Solution 1. Ni2+ +2e- => Ni . . Eo = -0.23 V . . S2- => S + 2e- . . Eo = +0.51 V---------------------------------------------------- Ni2+ + S2- => No + S . . Eo = +0.28 V . if a positive Eo = a Spontaneous Reaction 2. Pb2+ = 2e- => Pb . .Eo = -0.126 V . . . H2 ==> 2H+ + 2e- . . .Eo = +0.00 V ---------------------------------------------------------Pb2+ + H2 ==> Pb + 2H+ .Eo = -0.126 V ... a negative Eo = NONSPONTANEOUS (3) 2Ag+ + 2e- =>2 Ag . .Eo = +0.80 V . . .Cr ==> Cr2+ + 2e - . . . .Eo = +0.56 V -----------------------------------------------------------2Ag+ + Cr ==> 2Ag + Cr2+ . .Eo = +1.36 V ... a positive Eo= SPONTANEOUS


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