What mass of glycerin (C3H8O3), a nonelectrolyte, must be dissolved in 200.0 g water to give a solution with a freezing point of –3.60°C? Mass _____ g
What mass of glycerin (C3H8O3), a nonelectrolyte, must be dissolved in 200.0 g water to give a solution with a freezing point of –3.60°C? Mass _____ g
General Chemistry - Standalone book (MindTap Course List)
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter12: Solutions
Section: Chapter Questions
Problem 12.130QP: A CaCl2 solution at 25C has an osmotic pressure of 16 atm and a density of 1.108 g/mL. What is the...
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What mass of glycerin (C3H8O3), a nonelectrolyte, must be dissolved in 200.0 g water to give a solution with a freezing point of –3.60°C?
Mass _____ g
Expert Solution
Step 1
As we know,
ΔTf = Kf.m.i
where:
ΔTf = reduction of freezing from 0 degree celcius = 0 -(-3.60) = 3.60 degree celcius
Kf = freezing constant (for water around 1.86 oC/m
m = molal of solution = , m = mass of solute (in this caseglycrein), Mr = molecul mass of solute = (12 x 3) + (1 x 8) + (16 x3) = 92 sma, p = mass of solvent (in this case water) = 200.0 g
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