Define what is the freezing point of a solution in degrees, Chemistry

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Define what is the freezing point of a solution in degrees

1) Define what is the freezing point of a solution (in degrees Celsius) prepared by dissolving 50g of glycerin (C3H8O3) in 200g of ethanol (C2H5OH), which has a freezing point at -114.6 degrees Celsius, (Kf= 2.00 degrees Celsius/mol)?

2) Explain which liquid will have the lowest freezing point?

(A) aq. 0.8m glucose

(B) aq. 0.7 fluctose

(D) aq 0.5m NaCl

3) Explain why do we have to measure the boiling temperature of water in the experiment? Can we simply enter 100 degrees Celsius in equation (2)?

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