Question

The concentration at which degree of dissociation of a 0.2 M solution of CH3COOH becomes double is (Ka of CH3COOH = 1.8 × 10–5)

Answer 1

Answer:

Applying the Oswald dilution formula-

Ka=α2 

Now,

Ka=CC1(α2) (i)

Ka=C2(2α)2 (ii)

C2=4C1=40.02=0.05≈0.049M