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Physical Chemistry

Electrical Properties of Colloids

Science > Chemistry > Colloids > Charge on Colloidal Particles The colloidal particles carry an electric charge. The most important property of colloidal solution is that all suspended particles possess either positive or a negative charge. i.e. they carry the same nature of the charge. The mutual forces of repulsion between similarly charged particles prevent […]

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Physical Chemistry

Properties of Colloids

Science > Chemistry > Colloids > Properties of Colloids In this article, we shall study the general, mechanical and optical properties of colloids. General Properties of Colloids: Heterogenous Character: The ultramicroscopic examination indicates that colloidal dispersion is a heterogeneous system consisting of a continuous dispersion medium and discontinuous disperse phase. Visibility: Colloidal particles cannot be seen […]

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Physical Chemistry

Osmosis and Osmotic Pressure

Science > Chemistry > Solutions and Their Colligative Properties > Osmosis and Osmotic Pressure In this article, we shall study the phenomenon of osmosis and osmotic pressure. Semipermeable Membrane: A semipermeable membrane is a membrane which allows the solvent molecules, but not the solute molecules through it. Examples: Cellulosde, cellulose nitrate, animal bladder. Osmosis: The spontaneous […]

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Physical Chemistry

Boiling Point Elevation and Freezing Point Depression

Science > Chemistry > Solutions and Their Colligative Properties > Boiling Point Elevation and Freezing Point Depression In this article, we shall study two colligative properties of solutions, namely elevation of boiling point and depression in freezing point due to addition of solute. Elevation of Boiling Point: Boiling Point of a Liquid: Boiling point is […]

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Physical Chemistry

Numerical Problems on Lowering of Vapour Pressure

Science > Chemistry > Solutions and Their Colligative Properties > Numerical Problems on Lowering of Vapour Pressure In this article, we shall study to solve problems based on relative lowering of vapour pressure and to calculate the molecular mass of a solute. Example – 01: The vapour pressure of a pure liquid at 298K is […]

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Physical Chemistry

Lowering of Vapour Pressure of Solution

Science > Chemistry > Solutions and Their Colligative Properties > Colligative Properties In this article, we shall learn the meaning of colligative properties, colligative properties of solutions, and the lowering of vapour pressure due to the addition of solute in a solvent. Colligative Properties: Colligative properties are those properties of dilute solutions that depend only […]