Colligative properties problems answers remember that colligative properties depend only on the number or concentration of particles in a solution the properties are for ideal solutions independent of the kind or size of the particles whether ionic large or small etc as a consequence for ionic substances the colligative properties depend on the concentration of ions eg for 1m . What is the vapor pressure of the pure solvent if the vapor pressure of a solution of 10 g of sucrose c 6 h 12 o 6 in 100 g of ethanol c 2 h 6 o is 55 mmhg to solve this problem we will use raoults law then rearrange the equation to solve for the pressure of the pure solvent p o after . These colligative properties include vapor pressure lowering boiling point elevation freezing point depression and osmotic pressure this small set of properties is of central importance to many natural phenomena and technological applications as will be described in this module mole fraction and molality
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