Difference between Colloid and Suspension

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Dispersion systems consist of 2 or an ext chemical compound or basic substances, referred to as system components, distributed amongst each other. Castle form:

Dispersed step – the dispersed substance;Continuous medium – the substance in which the distributed phase is distributed.

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Depending on the dimension of the corpuscle of the disperse phase there are:

Heterogenous (rough) dispersion equipment – the particles are bigger 보다 100 nm:Suspension – a liquid and solid component;Emulsion – two liquid components;Aerosol – the dispersion tool is a gas.Colloids – the particles’ dimension is in between 1 and also 100 nm;Real options – the particle size is less than 1 nm.


What is Colloid?

Water options of many substances (sugar, etc.), quickly pass with plant or animal semipermeable barriers, while rather such as gelatin execute not pass with them. The an initial substances are referred to as crystalloids, and also the second are referred to as colloids.

Depending on just how the corpuscle of the dispersed phase describe the medium, the colloid solution are:

Lyophilic – adsorb a big number of molecule from the dispersion tool (gelatin, soaps, Fe(OH)3, Al(OH)3);Lyophobic – execute not tie or bind v a small variety of molecules native the dispersion tool (salts of specific metals, poorly soluble steel sulphides, etc.).

Depending ~ above the colloid bit structure the colloid systems are subdivided into:

Associated (micellar) – the particles are teams of atoms, ion or molecule (e.g. Sodium chloride in benzene);Molecular – the particles room molecules of a compound having actually a high molecule mass (e.g. Starch).

Depending top top the nature that the medium, the colloids are:

Hydrosols – the solvent is water;Benzenosols – the solvent is benzene;Etherosols – the solvent is ether etc.

The optical nature of the colloids are manifested as coloring, opalescence, and also Tindal effect. They are due to differences in the absorption and dispersion of irradiate from the colloidal particles.

Colloidal particles space larger and also heavier 보다 the ions and most that the molecules, so their diffusion and also osmotic push are low.

A properties kinetic property of colloids is the Brownian movement. The colloid equipment are less stable than that of the ordinary solutions. Under a continuous electric current, every the colloid particles move to the equivalent oppositely fee electrode. This phenomenon is dubbed electrophoresis.

Sols of molecule colloids are obtained analogously come the really solutions. Upon contact of the disperse phase dissolves spontaneously in the dispersed medium. The sols of linked colloids are derived by various dispersion and condensation methods.

Dispersion techniques – dispersion that the material to the size of the colloidal corpuscle in the visibility of a dispersion medium;Condensation methods – condensing (grouping) separation, personal, instance molecules, atom or ions into particles the colloid size.


What is Suspension?

Suspension is a heterogeneous liquid, include insoluble heavy particles that are huge enough come settle but for part time are current throughout the volume of the fluid matrix. The particles are bigger 보다 100 nm.

The group of the suspensions is based on the dispersed phase and the dispersion medium.

The suspension is closer come the insolubility in the solubility continuum. In the other finish of the solubility continuum is the solution, whereby the particles are completely mixed and also no solid step is observed. The solubility continuous is normally arranged in the order: insolubility, sedimentation, suspension, colloid and solution.

The solid step of the suspension is spread in the liquid phase by a mechanical stirring procedure by means of an inert or weakly energetic agent provided as a suspending agent. Unequal colloids, the suspensions resolve down over time. An example of a rapidly precipitating suspension is sand and also water.

A characteristic home of the suspensions is their optical inhomogeneity, i beg your pardon is expressed by turbidity. Turbidity is one integral external sign the the suspension and also is figured out by the visibility of insoluble corpuscle that are impermeable to light. The degree of turbidity the suspensions is different. It is identified by the concentration of the suspended phase and the level of that dispersion (particle size).

One of the most essential features the the suspensions is your sedimentation instability. That is to express in the inevitable settling of suspended corpuscle under the affect of gravity. Particles deserve to settle by themselves, without sticking together. In this situation there is one aggregative stability of the suspension.

If the stable particles stick together under the influence of molecular pressures of cohesion and form aggregates, climate there is one aggregative instability of suspensions. Thus, sedimentationally rough suspensions can be aggregatively secure or unstable.

Sometimes in coagulating suspensions, large flakes are developed that room poorly wetted through the dispersion medium and float to the surface. This phenomenon is dubbed flocculation.

Sedimentation instability of suspensions in practice leads to a gradual disruption the the uniform composition prior to the complete deposition of the insoluble phase.

There are likewise suspensions, having the ability to continue to be in a rely state for a long time. Castle are called stable suspensions.

The suspensions are obtained by miscellaneous dispersion and also condensation methods.

Difference between Colloid and also Suspension


Colloid: Dispersion mechanism with a liquid and solid component, with particles size between 1 and also 100 nm is dubbed colloid.

Suspension: Dispersion device with a liquid and solid component, with particles size above 100 nm is referred to as suspension.

Particle size

Colloid: The bit size is 1-100 nm.

Suspension: The particle size is above 100 nm.

Particle visibility

Colloid: The corpuscle in the colloid can not be seen through a nude eye.

Suspension: The particles in the suspension have the right to be seen with a naked eye.


Colloid: The colloids nothing undergo sedimentation.

Suspension: The suspensions undergo sedimentation.


Colloid: The colloids are fairly homogenous.

Suspension: The suspensions are heterogeneous.

Permeability v filter paper

Colloid: The colloid particles deserve to pass v filter paper.

Suspension: The suspension particles can not pass v filter paper.


Colloid: Gelatin in water, starch in water, sodium chloride in benzene, etc.

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Suspension: Sand in water, powdered chalk in water, mercury in oil, etc.

Colloid and Suspension to compare Chart


Summary of Colloid and also Suspension

Dispersion solution consist of 2 or more chemical compound or straightforward substances, referred to as system components, distributed amongst each other. They kind a spread phase and also a constant medium.Dispersion mechanism with a liquid and solid component, through particles size in between 1 and 100 nm is dubbed colloid.Dispersion system with a liquid and solid component, through particles size over 100 nm is dubbed suspension.The corpuscle in the colloid cannot be seen with a naked eye, when the corpuscle in the suspension can be seen v a naked eye.The colloids don’t undergo sedimentation, while the suspensions undergo sedimentation.The colloids are relatively homogenous, while the suspensions room heterogeneous.The colloid particles deserve to pass through filter paper, while the corpuscle of the suspensions cannot.Examples of colloids room gelatin in water, strength in water, salt chloride in benzene, etc. Examples of suspensions room sand in water, powdered chalk in water, mercury in oil, etc.