# chem - freezing point

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When 18 g of ethylene glycol C2H6O2 is dissolved in 150 g of pure water, the freezing point of the solution is

_____ C. (The freezing point depression constant for water is 186C kgmol.

• chem - freezing point -

moles ethylene glycol = grams/molar mass
solve for moles ethylene glycol.

molality = mols/kg solvent
solve for molality

delta T = Kf*m
solve for delta T

Subtract delta T from zero C to obtain the freezing point.

• chem - freezing point -

b. What is the freezing point depression when 153 g of bromine is added to 100 g of benzene?

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