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Byju's Answer
Standard XII
Chemistry
Depression in Freezing Point
Calculate the...
Question
Calculate the amount of sodium chloride which must be added to one kilogram of water so that the freezing point of water is depressed by 3 K. (Given,
K
f
=1.86 K kg
m
o
l
−
1
, atomic mass of Na=23, Cl=35.5).
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Solution
Δ
T
f
=
k
f
×
m
o
l
a
r
i
t
y
⇒
3
=
1.86
×
w
58.5
1
⇒
w
=
3
×
58.5
1.86
=
94.35
g
m
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0
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Q.
Calculate the amount of
K
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2
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Q.
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[
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Q.
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