Question

Calculate the standard potential for the half-reaction 2 2 − ⇌ 2 −() given that for 2 is 7.9 × 10−8 and given that the standard potential for the halfreaction 2 2 − ⇌ is −0.126 �

Answer 1

The standard potential for the half-reaction 2 2 − ⇌ 2 −() is 0.126 V.

Step-by-step explanation:

The standard potential for the half-reaction 2 2 − ⇌ 2 −() can be calculated using the standard potential for 2 is 7.9 × 10−8 and the standard potential for the half-reaction 2 2 − ⇌ is −0.126. By convention, the tabulated Eº value for the half-reaction at the anode is reported as a reduction potential. To obtain the standard electrode potential for the oxidation half-reaction, we reverse the sign of the reduction potential.

Thus, the standard electrode potential for the oxidation of 2 2 − ⇌ 2 −() is (-0.126) = 0.126 V.