What is the freezing point temperature of CaCl2 Solution?
October 14th, 2008
Chemistry Tutor Site - Chemistry Homework Help
A student makes a solution that made from 135 g of Calcium Chloride in 155 mL of water? Can you calculate the freezing point temperature of that solution ?
Chemistry Tutor Site - Chemistry Homework Answer
Moles of caCl2
= mass/Mr
= 135/111
= 1.216 mol
Molality of CaCl2
= mol/Kg
= 1.216 mol/0.155
= 7.85 m
freezing point depression:
= 1.86 deg/m x 7.85 m . 3
= 43.8030C
the “3″ is the Van Hoff factor of CaCl2 thus the freezing point is - 43.8030C
Entry Filed under: Colligative Properties of Solution
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