Question

The relative lowering of vapour pressure produced by dissolving 64g of a solute in 1kg of water in 0.00612. what is the molecular weight of the solute?​

Answer 1

Answer:

Correct option is

D

180

Mass of solute, w=71.5g

Mass of solvent, W=1000g

Now,

P

∘

P

∘

−P

s

=

w/m+W/M

w/m

or

0.00713=

71.5/m+1000/18

71.5/m

⇒m=180