1.

Define boiling point. Write the formula to determine molar mass of a solute using freezing point depression method.

Answer»

The boiling point of a liquid is defined as the temperature at which the vapour pressure of the liquid becomes equal to the atmospheric pressure.

The formula to determine molar mass of a solute using freezing point depression method is

M2 = \(\frac{K_fW_2}{ΔT_fW_1}\) 

Where,

M2 = Molar mass of solute in kg mol–1 

Kf = Cryoscopic in K kg mol–1 constant 

ΔTf = Depression in freezing point in K 

W2 = Mass of solute in kg 

W1 = Mass of solvent in kg



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