Question

1. Represent the cell in which the following reaction takes place. Mg(s) + 2Ag²⁺(0.0001M) → Mg²⁺(0.130M) + 2 Ag(s). Calculate its E_cell if E°_cell = + 3.17 V.

2. Discuss the variation of molar conductivity with concentration for acetic acid and KCI.

Answer 1

1. Mg(s) | Mg²⁺(0.130M) || Ag⁺(0.0001M) | Ag(s)

2. Conductivity decreases with dilution because the number of ions per unit volume that carry the current in a solution decreases on dilution. For strong electrolytes molar conductivity increases steadily with increase in dilution due to decrease in interionic attraction. For weak electrolytes molar conductivity increases with dilution due to increase in degree of dissociation.