Heterogenous vs Homogenous (Definitions, Examples, & Practice)

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When we discuss mixtures we can broadly classify them as heterogenous or homogenous. This is common question on chemistry quizzes and tests where you are given a mixture, for example salt water, and asked to determine whether is a heterogenous or homogenous mixture.

The general definition is:

Heterogenous: Not uniform (unevenly distributed).
Examples: rocks in mud, salad, nails in sand

Homogenous: Uniform composition (same throughout).
Examples: salt water, smoke, alloys

Note that you can have a mixture, like rock, water, and sugar that has hetero and homo components. In this case the rocks and sugar water are a heterogenous mixture. If we look just at the sugar dissolved in the water, this has a uniform/smooth composition and is therefore a homogenous solution.

We can separate both heterogenous and homogenous mixtures using their physicals properties. For example filtration, distillation, sorting based on size, or gravitational sorting based on density.
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firebird
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But in collide particles are evenly distributed so why it is heterogeneous

shashimohanpathak