Solubility of Gases in Water

 Here’s a simple, CBSE Class 12–friendly explanation of the paragraph you shared, ideal for teaching or including in your presentation/notes:

💧 Solubility of Gases in Water – Examples

🧪 Key Idea:

Many gases can dissolve in water, but their solubility varies depending on the nature of the gas.

🔍 Examples:

  • Oxygen (O₂)
    ➤ Dissolves only to a small extent in water
    ➤ This small amount of dissolved oxygen supports aquatic life (like fish, plants)

  • Hydrogen chloride (HCl)
    ➤ Highly soluble in water
    ➤ Forms hydrochloric acid (HCl solution) when dissolved

📌 Why Do Different Gases Dissolve Differently?

  • Polar gases (like HCl) dissolve better in polar solvents like water.

  • Non-polar gases (like O₂) dissolve less in water.

  • Solubility also depends on temperature, pressure, and intermolecular forces.

📝 CBSE Exam Tip:

  • Give these two examples if asked:
    ➤ Low solubility – O₂ (for aquatic life)
    ➤ High solubility – HCl (forms acid)

Would you like a comparison chart or a visual diagram to explain this better in your class?

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