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Homogeneous Mixture Definition: Lesson for Kids

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  • 0:04 What Does Homogeneous Mean?
  • 0:41 Solids
  • 0:58 Gasses
  • 1:15 Liquids
  • 1:58 Homogenization
  • 2:41 Lesson Summary
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Lesson Transcript
Instructor: Erin Noxon
In chemistry, when you put one or more things together that aren't combined chemically, you start to have a mixture. There are two types of mixtures in chemistry. Today we are going to talk about homogeneous mixtures.

What Does Homogeneous Mean?

A homogeneous mixture is one that's mixed or blended together so well that all of the ingredients will not separate out, even over time. Something that's homogeneous can only be separated by a mechanical process or action, such as heat or using fine filters.

The word homogeneous comes from Latin and Greek. The prefix homo means 'same' and gene means 'kind'. The suffix -ous makes it an adjective. So when you describe a mixture as homogenous, you are saying it is 'of the same kind' throughout the whole mixture.

As we will see, homogeneous mixtures can be solids, gasses, or liquids.

Solids

One example of a solid homogeneous mixture is steel. All of the different elements that make up steel are spread evenly throughout it. It's not its own chemical substance, though; it's just a mixture. Copper and zinc can be put together to make another homogeneous mixture: brass.

Steel is a homogeneous mixture.
Steel chains.

Gasses

Gasses can be homogeneous mixtures, too. The air that we breathe around us is a homogeneous mixture. It's made up of nitrogen, oxygen, carbon dioxide, and many other gasses, but you can't tell the difference when you're breathing, since it is all mixed up and spread out evenly.

Liquids

A liquid that is homogenous is called a solution. A solution is a mixture made of two or more things (at least one liquid) that are mixed up together evenly. A simple example of a solution would be salt water. When salt is dissolved in water, the salt spreads out within the water evenly. If you taste it, you'll be drinking water that's salty, and you won't feel any salt crystals on your tongue. In order to separate the salt from the water, you'd have to heat the water and boil it out, leaving the salt behind. This is an example of a mechanical action like we talked about earlier.

Rain is a homogeneous mixture called a solution.
Rain is a homogeneous mixture, called a solution.

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