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CGP EDU Academic Team
Published on: August 14, 2026
The amount (in grams) of sucrose (mol wt. = 342 g) that should be dissolved in 100 g water in order to produce a solution with a 105. 0 °C difference between the freezing point and boiling point is (Given that K f = 1.86 K kg mol -1 and K b = 0.51 K kg mol -1 for water)
Text Solution
Verified by ExpertsThe correct answer is:
B
72. 2 g
Boiling point (T b ) = 100 + 
T b = 100 + k b m
Freezing point (T f ) = 0 - 
T f = -k f m
T b - T f = (100 + k b m) - (-k f m)
105 = 100 + 0. 51 m + 1.86 m
2.37m = 5 or m = 
= = 2 .11
Weight of sucrose to be dissolved in 100 g water
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