Chapter 11, Problem 11.113CHP

Interpretation Introduction

Interpretation:

Given the osmotic pressure of a solution containing glycerol and dimethylformamide (DMF) the mole fraction of glycerol has to be calculated.

Concept Introduction:

In the process of osmosis, the solvent molecules pass through a semi - permeable membrane from less concentrated solution to more concentrated solution.  The pressure that has to be applied to prevent the flow of solvent molecules is called osmotic pressure.  It is expressed as,

$\Pi =MRT$

Where,

$\begin{array}{l}\Pi \text{= osmotic pressure}\\ \text{M}\text{= Molar concentration}\\ \text{R}\text{= Universal gas constant}\\ \text{T}\text{= Temperature}\end{array}$

Molarity or molal concentration is one of the many parameters that is used to express concentration of a solution.  It is expressed as,

$\text{Molarity = }\frac{number\text{ of }molesof\text{ solute}}{volume\text{ of solution in L}}$