Asked by jennifer
how many grams of methanol must be added to 5.00kg of water to lower its freezing point to -12.0 degrees C? for each mole of solute the freezing point of 1kg of water is lowered 1.86 degrees C?
Answers
Answered by
DrBob222
You want delta T to be 12.5 C.
delta T = Kf*m
You know delta T and Kf, solve for molality (m).
m = mols CH3OH/kg solvent. You know kg solvent and m, solve for mols CH3OH.
Then mols CH3OH = grams/molar mass. YOu know molar mass and mols, solve for grams.
delta T = Kf*m
You know delta T and Kf, solve for molality (m).
m = mols CH3OH/kg solvent. You know kg solvent and m, solve for mols CH3OH.
Then mols CH3OH = grams/molar mass. YOu know molar mass and mols, solve for grams.
Answered by
Anonymous 2
Hello DrBob222, thank you for trying to help explain it, but unfortunately it was not helpful.
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