HARDMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryIonic equilibriumAchiever Section
For a “c molar” concentrated solution of a weak electrolyte AxBy, the degree of dissociation is given as (a) (b) (c) (d)
Answer
C
Explanation
Let us consider the given electrolytic reaction as follows: y+ x- x y A B xA + yB initial c 0 0 at eqm. c ( y ) cx cy c x x y eq K [cx ] [ cy ] / [c c(x y )] x y 1 x y x y [c] x y [ ] / [ 1 (x y)] x is very small as compared to 1. x y 1 x y x y eq x y 1 x y 1/x y eq Therefore, [ 1 (x y)] 1 K [c] x y [ ] /1 [K /[c] x y ]
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