# Chemistry 108

Calculate the freezing point and boiling point of a solution containing 14.8g of naphthalene (C10H8) in 120.0mL of benzene. Benzene has a density of 0.877 g/cm3.

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1. mass benzene = volume x density = ?
mols benzene = grams/molar mass = ?
m benzene = mols benzene/kg solvent

For f.p.: delta T = Kf*m, then subtract delta T from 0C to find new f.p.

For b.p.: delat T = Kb*m, the add delta T to 100 C to find new b.p.

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2. F.P: -7 degrees celsius
B.P: 102 degrees celsius

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