True Solution vs Colloidal Solution vs Suspension
(Similarities and Differences between True Solution, Colloidal Solution and Suspension)
Based on the nature of particle size, solutions are classified into THREE categories, namely (1) True Solution, (2) Colloidal Solution and (3) Suspension. Apart from the size differences of particles, these sub-categories of solutions also show considerable difference in their nature, colour, filterability and appearance.
(1). True Solution: a mixture of two or more substances in which the solute is completely dissolve in the solvent. The size of particles in a true solution will be less than 1 nm in diameter.
(2). Colloidal Solution: a heterogenous mixture of two or more substances in which the substance is evenly suspended in the other. The size of particles in a colloidal solution will be larger than that of a true solution and smaller than suspension. The size range of particles in a colloidal solution will be 1 – 1000 nm in diameter.
(3). Suspension: The size of particles in a suspension will be greater than 1000 nm. Suspension is a heterogenous mixture of two or more substances.
The present post describes the Similarities and Differences between True Solution, Colloidal Solution and Suspension with a Comparison Table.
Similarities & Differences between True Solution, Colloidal Solution & Suspension
|True Solution||Colloidal Sollution||Suspension|
|Particle size||Less than 1 nm in diameter||1 – 1000 nm in diameter||Greater than 1000 nm|
|Example||Sugar solution in water||Starch dissolved in water||Soil dissolved in water|
|External appearance||Clear and homogenous||Clear and homogenous||Opaque and heterogenous|
|Nature of solution||Homogenous||Heterogenous||Heterogenous|
|Number of phase systems||One phase system||Two phase systems||Two phase systems|
|Visibility of particles under naked eye/ Light Microscope||Not visible||Not visible||Visible|
|Visibility of Particles under electron microscope||Not visible||Visible||Visible|
|Separation by filtration||Not possible||Not possible||Possible|
|Effect of gravity on sedimentation||Will not sediment||Will not sediment||Sediment|
|Electrolysis||Undergo electrolysis||Undergo catephoresis||Undergo electrophoresis|
|Colour of solution||Depends on the nature of soluble salt or ions||Depends on the size of the colloidal particles||Depends on the colour of suspended particles|
|Tyndal effect||Does not exhibit Tyndal effect||Exhibits Tyndal effect||Light cannot pass through the suspension|
|Brownian movements||Particles will not show Brownian movements||Particles will show Brownian moments||May or may not show Brownian movements|
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