dissolution

 Here’s a clear and Class 12 CBSE-friendly explanation of the term “Dissolution” for your classroom use:

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🧪 Dissolution – Definition and Explanation

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📖 Definition:

Dissolution is the process in which solute particles break away from the solid and mix uniformly with the solvent to form a solution.

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🔍 Simple Explanation:

When you add a solid (like salt or sugar) to a liquid (like water), the solute particles:

• Leave the solid surface

• Spread throughout the solvent

• Result in a homogeneous mixture (solution)

👉 This process is called dissolution.

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🔁 Dissolution in Equilibrium:

In a saturated solution, dissolution is balanced by crystallisation:

Rate of dissolution = Rate of crystallisation
This creates dynamic equilibrium.

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🧠 Real-Life Examples:

• Salt dissolving in water while cooking

• Sugar dissolving in tea

• ORS powder dissolving in water

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📌 Important Points:

• It increases the concentration of solute in the solution.

• It depends on:

  • Solute–solvent interactions

  • Temperature

  • Stirring and surface area

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Would you like a diagram or animation slide idea to visually show how dissolution happens at the particle level?