00:02
All right, look like you had some questions about what a mixture is.
00:06
So i put some notes down to help you with the questions that you put up on your homework questions.
00:14
Basically, a mixture is composed of more than one pure substance.
00:18
So pure substance would be compounds or elements.
00:22
We have to have at least two of those pure substances mixed to create a mixture.
00:30
They involve more than one material, like i said.
00:33
They could be thoroughly mixed like an alloy or a colloid is.
00:39
Solutions, they're all thoroughly mixed, or they can just be mixed together like a bowl of salad, and you can actually see the material inside.
00:48
They do not change the materials chemically.
00:52
They just rearrange how they're oriented, but none of the atoms are changed.
00:58
They're still in the same state that they were before, so the chemical reaction isn't happening when we do a mixture.
01:06
They can be homogeneous, which is when we can't see the particles or heterogeneous where we can see the particles.
01:13
So examples would be a homogeneous mixture would be like kool -aid or milk, while a heterogeneous mixture might be gravel in the concrete...