SOLUBILITY OF GASES | CHEMISTRY TUTORIALS | SCIENCE TUTOR

Solubility of Gases

SOLUBILITY

It is defined as the maximum amount of solute that will dissolve in given quantity of the solvent as a particular temperature

or

Solubility of a substance is the amount of substance that dissolves in 100g of the solvent at a given temperature to form a saturated solution.

  

The Solubility of a substance depends upon:

• The nature of solute and solvent
• Temperature
• Molecular size
• Pressure

Nature of Solute and Solvent

• Solid Solute: solid solute get dissolved in solvent which has comparatively similar intermolecular interactions i.e. “like dissolves like”

For example, Ionic solid such as NaCl dissolved readily in a polar solvent like water whereas covalent solid such as naphthalene, anthracene dissolve readily in non-polar solvents like benzene, ether, CCl₄ etc.

• Gaseous Solute: gases like H₂, O₂ N₂ He etc. have less solubility in water as compared solubility of NH₃, HCL, SO₂ etc. in water. The reason for higher solubility is the chemical reactivity of gases with water.

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