Question

1. the purpose of the aqueous solutions in a galvanic cell is to?

a. provide ions to be oxidized and reduced

b. provide a path for the free flow of electrons

c. maintain charge balance in the cell

d. correct any volume changes in the cell


2. given these half-reactions,

B2 + 2e- -> 2B- Ecell= 0.662 V

A+ Ie- -> A Ecell= -1.305V


what is the standard potential for the overall reaction. 2A+B2 -> 2AB


a. -1.97 V

b. -0.643 V

c. +3.272 V

d. +1.967 V

Answer 1

1. The correct option is;

c. maintains charge balance in the cell

2. The correct option is;

c. +3.272 V

Step-by-step explanation:

The aqueous solution in a galvanic cell is the electrolyte which is a ionic solution containing that permits the transfer of ions between the separated compartment of the galvanic cell such that the overall system is electrically neutral

Therefore, the aqueous solution maintains the charge balance in the cell

2. Here we have;

B₂ + 2e⁻ → 2B⁻ Ecell = 0.662 V

A⁺ + 1e⁻ → A Ecell = -1.305 V

Hence for the overall reaction, we have;

2A + B₂ → 2AB gives;

(0.662) - 2×(-1.305) = +3.272 V.