Chemistry / Unit 1 Chem 0043 short lesson, about 20 seconds
Mixture
Captions available
The idea
A mixture is matter composed of two or more substances present in varying amounts and separable by physical changes.
In practice
Salt water separates back into salt and water by evaporation, a physical process that breaks no chemical bonds.
Where people slip
A mixture and a compound can look equally uniform; the test is whether the components pull apart without a chemical change.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Something wrong in this lesson? Flag it · Sources for Chemistry