   Chapter 11, Problem 102AE

Chapter
Section
Textbook Problem

# If the human eye has an osmotic pressure of 8.00 atm at 25°C, what concentration of solute particles in water will provide an isotonic eyedrop solution (a solution with equal osmotic pressure)?

Interpretation Introduction

Interpretation: The concentration of solute particles in water has to be calculated.

Concept Introduction:

When a semipermeable membrane, separates a solution and pure solvent. The solvent molecules are passed through the semi permeable membrane. There is gradual increase in the volume of solution with a decrease in a volume of the solvent with respect to time. The flow of solvent through a semipermeable membrane into the solution is called as osmosis.

By the time system reaches equilibrium, the changes in the liquid level stops. There is a higher hydrostatic pressure on the solution than compared to that of the pure solvent because there is variation in the liquid levels at this point. The excess pressure on the solution is called osmotic pressure.

The osmotic pressure of solution is calculated by using,

Π=MRT

Here,

Π=osmoticpressure(in atm)

M=molarityofsolution(inM)

R=Gasconstant

T=Temperature(inK)

Explanation

Record the given data

Osmoticpressure=8.00atmTemperature=25°C

To calculate the concentration of solute particles

Π=MRT

M=ΠRT=8

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