For a concentrated solution of a weak electrolyte ( K eq = equilibrium constant) A 2 B 3 of concentration ‘ C ’ , the degree of dissociation ‘ α ’ is

Step-by-step solution

Given that concentration of A 2 B 3 is C and degree of dissociation is α The equilibrium reaction of weak electrolyte A 2 B 3 is A 2   B 3 ⇌ 2   A 3 + + 3   B 2 - C - - ↓ ↓ ↓ C ( 1 - α ) 2 C α 3 C α Now, The equilibrium constant is the ratio of the concentrations of reactants and products raised to the stoichiometric coefficients. K eq = ( 2 Cα ) 2 ( 3 Cα ) 3 C ( 1 - α ) = 108 C 4 α 5 K eq 108 C 4 = α 5 ⇒ α = K eq 108 C 4