Question

Calculate the standard cell potential given the following standard reduction potentials: Al3++3e−→Al;E∘=−1.66 V Cu2++2e−→Cu;E∘=0.340 V

Answer 1

The standard cell potential can be calculated by subtracting the standard electrode potentials for the oxidation and reduction half-reactions. In this case, the standard cell potential is 2.00 V.

Step-by-step explanation:

The standard cell potential (Eºcell) can be calculated by subtracting the standard electrode potential for the oxidation half-reaction (Eºanode) from the standard electrode potential for the reduction half-reaction (Eºcathode). In this case, the reduction half-reaction is Cu2+ + 2e- -> Cu; Eº = 0.340 V, and the oxidation half-reaction is Al -> Al3+ + 3e-; Eº = -1.66 V. Subtracting these values gives the standard cell potential:

Eºcell = Eºcathode - Eºanode = 0.340 V - (-1.66 V) = 2.00 V.