Answer:
According to Raoult's law for any solution
the partial vapour pressure of each volatile component in the solution is
directly proportional to its mole fraction.
CHCI3 (1) and CH2CI2
(l) both are volatile components.
Hence, for a binary solution in
which both components are volatile liquids, the total pressure will be
where, p = total vapour
pressure
=
partial vapour pressure of component 1
=
partial vapour pressure of component 2
(b) NaCI (s) and H2O
(l) both are non-volatile components.
Hence, for a solution containing
non-volatile solute, the Raoult's law is applicable only to vaporisable
component and total vapour pressure can be written as
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