# Chemistry

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What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water? The molal freezing point depression constant for water is 1.86°C/m. (Note that when Ca(NO3)2 dissolves in water Ca2+ and NO32- ions are produced).

• Chemistry -

mols Ca(NO3)2 = grams/molar mass
molality = mols/kg H2O
delta T = i*Kf*m
You have Kf and m. i for Ca(NO3)2 is 3.

• Chemistry -

should i get -3.34? can't help but feel as though i did wrong

• Chemistry -

-3.34 C agrees with my quick calculation.

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