Question

vapour pressure of a solvent decreases by 1% on adding a non volatile solute in Na2SO4 if dissociate up to 25% then determine mole fraction of solute if solvent is 5 mole

Answer 1

Answer:

Explanation:

Na2SO4----->2Na^+1+SO4^-2

NOW

alpha= i-1/m-1

0.25= i-1/3-1

=> i= 1.5

Now

0.01Pa/Pa = iXb. (mole fraction of solute = Xb)

Or

0.01 =1.5Xb

=> Xb= 1/150

Answer 2

Answer:

Explanation:

Please seee the pic for answer