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Standard XII
Chemistry
Depression in Freezing Point
A solution of...
Question
A solution of ester in benzene freezes at
0.84
K
temperature, blow the freezing point of the solution. What is the molality of the solution if
k
f
of benzene is
5.12
K
k
g
m
o
l
−
1
?
Open in App
Solution
Given
k
f
=
5.12
k
g
m
o
l
−
1
Δ
T
f
=
0.84
K
Δ
T
f
=
k
f
×
m
where
m
is the molality
m
=
0.84
5.12
=
0.16
m
o
l
/
k
g
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0
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Q.
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