The osmotic pressure needs to be explained. The units of molarity used in the calculation of osmotic pressure needs to be explained and the conditions at which the molarity of the solution becomes equal to the molality of the solution needs to be explained. Concept introduction: Colligative properties are the properties of the ideal solutions depending on the number of solute particles (i.e. ions or molecules) dissolved in a definite amount of solvent and not on the nature of solute. Important colligative properties are as follows: Relative lowering in vapor pressure Osmotic pressure Elevation in boiling point Depression in freezing point

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Chapter 17, Problem 59E

Interpretation Introduction

Interpretation: The osmotic pressure needs to be explained. The units of molarity used in the calculation of osmotic pressure needs to be explained and the conditions at which the molarity of the solution becomes equal to the molality of the solution needs to be explained.

Concept introduction: Colligative properties are the properties of the ideal solutions depending on the number of solute particles (i.e. ions or molecules) dissolved in a definite amount of solvent and not on the nature of solute.

Important colligative properties are as follows:

Relative lowering in vapor pressure

Osmotic pressure

Elevation in boiling point

Depression in freezing point

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