Sodium ion and Sodium Mercury Amalgam Reaction-Multiple Choice Question 

Question

Sodium ion, Na⁺, in solution can be reversible reduced at a mercury electrode to sodium mercury amalgam, Na (Hg), as is summarized in the reaction below

The effect of electrode potential on the direction of this reaction is graphically represented as

Match each figure label 1,2,3,4,5,6, E⁷,E⁸, (a), (b), (c) to its description.

Answer                                                                       Choices

Overpotential for Oxidation -------------------    (1 or 2 or 3 or 4 or 5 or 6)

Overpotential for reduction ---------------------  (1 or 2 or 3 or 4 or 5 or 6)

High barrier to oxidation  -----------------------  (1 or 2 or 3 or 4 or 5 or 6)

High barrier to reduction ------------------------ (1 or 2 or 3 or 4 or 5 or 6)

Low barrier to reduction ------------------------  (1 or 2 or 3 or 4 or 5 or 6)

Low barrier to oxidation ------------------------  (1 or 2 or 3 or 4 or 5 or 6)

Reaction coordinate at Equilibrium -------------------   (a) or (b) or (c)

Reaction coordinate for oxidation process -----------   (a) or (b) or (c)

Reaction coordinate for reduction process ------------  (a) or (b) or (c)

Reduction potential  -------------------------------------    (E⁷ or E⁸)