Answer all parts. (a) discuss the trend of conductivity values for the various ions given below. ) 4
cation ionic radius (å) conductivity (ms m2 mol−1 )
h+ - 34.96
li+ 0.69 3.87
na+ 0.97 5.01
k+ 1.33 7.35 [15 marks]
(b) at 25°c the molar conductivity (λm) of 0.01 mol dm–3 aqueous acetic acid is 1.62 × 10−3 s m2 mol–1 and the molar conductivity at infinite dilution (λ°) is 39.07 × 10−3 s m2 mol-1. calculate the degree of dissociation (α) and the ph and pka of the 0.01 m acetic acid solution.