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Question

How is a suspension different from a colloid?

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Solution

A suspension is defined as a heterogenous mixture of particles with a diameter greater than 1000 nm such that the particles are visible to naked eyes. Eg : muddy water, etc

A Colloid is an intermediate between solution and suspension. It has particles with sizes between 2 to 1000 nanometers. A colloid is easily visible to naked eye. Colloids can be distinguished from solutions using Tyndall effect.

The main differnces are
Colloids. Suspension
Homogeneous Heterogeneous
size 1-1000 nm particle size above 1000nm
Particles can be removed by ultrafiltration Particles can be removed by filtration.
Particles dont settle easily Particles settle easily.
Tyndall effect may or maynot show tyndall effect.
Translucent Opaque
Particles not easily seen through naked eye particles seen through naked eye

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