Answered: What mass of ethylene glycol (C2H6O2,…

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter14: Mixtures And Solutions

Section14.3: Factors Affecting Solvation

Problem 42SSC

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What mass of ethylene glycol (C2H6O2, molar mass = 62.1 g/mol), the main component of antifreeze, must be added to 8.5 L water to produce a solution for use in a car’s radiator that freezes at -10.0 degrees F (-23.3 degrees C)? Assume the density of water is exactly 1 g/mL. Kf of water = 1.86 degrees celcius C – kg/mol.

Please use the given formula below:

AT f = Kfm solute
depression
AT, = freezing-point
T₁= freezing point of solution
freezing point of pure solvent
T, <T,°
AT₁=T₁-T₁T₁=
K₁ = molal freezing-point depression constant (°C-kg/mol)
(For water: K,= 1.86 °C-kg/mol)
msolute = molality of the solute in the solution

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