Question: Pb | PbSO4(s) | SO4 2- (1,00 M) || H+ (2,00 M), SO4 2- (1,00 M) | PbSO4(s) | PbO2 (s) Donde PbSO4 (s) +

Pb | PbSO4(s) | SO4 2- (1,00 M) || H+ (2,00 M), SO4 2- (1,00 M) | PbSO4(s) | PbO2 (s) Donde PbSO4 (s) + 2 e- = Pb(s) + SO4 2- (aq) EPb/PbSO4 = -0.355 V PbO2 (s) + 4 H+ (aq) + SO4 2- ( aq) + 2 e- = PbSO4 (s) + 2 H2O(l) EPbO2/PbSO4 =+1.685 V (a) Identifique qu semirreaccin ocurre en el nodo y cul ocurre en el ctodo. (b) Calcule los potenciales de las semireacciones, dadas las concentraciones anteriores. (c) Cules son los nmeros de oxidacin (estados de oxidacin) del plomo en las tres especies que lo contienen (PbSO4, Pb y PbO2)? (d) Escriba la reaccin qumica general equilibrada de la clula. (e) En la reaccin qumica general, cul de los reactivos acta como oxidante? (f) Calcule el potencial de la celda (Ecell) e indique si la celda es galvnica, electroltica o ninguna de las dos. (g) La reaccin celular general es espontnea o no?

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