Cocaine is a non-electrolyte that has a molecular weight of 303.4 g/mole. How many grams must be dissolved in 25.0 mL of Chloroform (density = 1.484 g/mL) to raise its boiling point to 65.5 Celsius? The boiling point of pure Chloroform is 61.2 Celsius.

Question

Cocaine is a non-electrolyte that has a molecular weight of 303.4 g/mole. How many grams must be dissolved in 25.0 mL of Chloroform (density = 1.484 g/mL) to raise its boiling point to 65.5 Celsius? The boiling point of pure Chloroform is 61.2 Celsius.
Kb Chloroform = 3.62 Celsius/m

DrBob222 · Answer

Calculate delta T for CH3Cl3. delta T = Kb*m Solve for m m = moles/kg solvent Solve for moles. moles cocaine = grams/molar mass Solve for grams.