Define osmotic pressure of a solution. How is the osmotic pressure orelated to the concentration of a solute in a solution ?

Explanation

### Step-by-Step Text Solution:

**Step 1: Definition of Osmotic Pressure**
Osmotic pressure is defined as the minimum excess pressure that must be applied to a solution to prevent the flow of solvent into it through a semi-permeable membrane. This membrane allows only the solvent molecules to pass through, while solute particles are retained.

**Step 2: Understanding the Process of Osmosis**
When a solution is separated from pure solvent by a semi-permeable membrane, solvent molecules will naturally move from the area of lower solute concentration (the pure solvent side) to the area of higher solute concentration (the solution side). This movement continues until equilibrium is reached, leading to an increase in the volume of the solution.

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