`k=7.896xx10^(-5)"S cm"^(-1),M=0.00241"mol L"^(-1)`
`^^_(m)^(c)=(1000xxk)/(M)=(1000xx7.896xx10^(-5))/(0.00241)"S cm"^(2)"mol"^(-1)`
`=32.765"S cm"^(2)"mol"^(-1)`
`^^_(m)^(@)=390.5"S cm"^(2)"mol"^(-1)`
तब `alpha=(^^_(m)^(c))/(^^_(m)^(@))=(32.765)/(390.5)=0.0839`
ऐसीटिक अम्ल का आयनन निम्न प्रकार होता है
`underset(1-alpha)(CH_(3)COOH)hArrunderset(C" "alpha)(CH_(3)COO^(-))+underset(C" "alpha)(H^(+))`
`K_(a)=(C" "alpha*Calpha)/(C(1-alpha))=(C" "alpha^(2))/(1-alpha)=Calpha^(2)`
अतः `K_(a)=0.00241xx(0.0839)^(2)=1.69xx10^(-5)`