like dissolve like

 Sure! Here's a simple, impactful explanation of "Like Dissolves Like" — perfect for Class 12 CBSE students in class or presentation.


🧪 “Like Dissolves Like” – Explained Simply


Meaning:

A solute dissolves best in a solvent that has similar polarity or similar type of intermolecular forces.

In simple words:

Polar substances dissolve in polar solvents
Non-polar substances dissolve in non-polar solvents

📌 That’s why we say: “Like dissolves like.”


💡 What is Polarity?

  • Polar molecules have a positive and negative end (due to unequal sharing of electrons).
    👉 Example: Water (H₂O)

  • Non-polar molecules have no such charge separation.
    👉 Example: Benzene (C₆H₆), oil


🔍 Examples:

Solute Solvent Result Explanation
Salt (NaCl) Water ✅ Dissolves Both are polar
Sugar Water ✅ Dissolves Both are polar
Naphthalene Benzene ✅ Dissolves Both are non-polar
Oil Water ❌ Does not dissolve Oil = non-polar, Water = polar

🧠 Why It Happens:

  • When solute and solvent have similar forces, they can mix easily.

  • If their forces are different (e.g., strong H-bond in water, weak dispersion in oil), they don’t mix.


📌 CBSE Tip:

Use this principle to predict solubility in MCQs and theory questions.
Always give examples like NaCl in water and naphthalene in benzene.


Would you like a diagram or slide design to explain this visually in class?

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