2.33 of is dissolved in of water. The depression in the freezing point of water observed is . Calculate the van’t Hoff factor and dissociation constant of fluoroacetic acid.
Firstly we need to calculate molality in order to get vant's hoff factor.
So moles of CH2FCOOH :
We need to assume volume of solution to be nearly equal to 500 mL. (as 500 g water is present)
Now, we know that :
Now for dissociation constant :-
Put values of C and a in the above equation, we get :