Download presentation
Presentation is loading. Please wait.
Published byEileen Webb Modified over 9 years ago
1
Mixtures and Compounds
2
Composition of Matter One way we classify matter is either pure substances or mixtures. Pure substances are either elements or compounds. An element is a substance that cannot be broken down into simpler substances even by a chemical reaction. A compound is a pure substance composed of two or more elements combined chemically in definite proportions.
3
Elements versus Compounds Identify each of the following as an element or a compound. 1) He 2) H 2 O 3) Sodium chloride 4) copper
4
Mixtures A mixture is a combination of two or more elements or compounds. Mixtures differ from pure compounds in that their components can be separated by physical processes. Examples: * pencil lead * salt water * air
5
Types of Mixtures Homogeneous mixtures have the same composition throughout. Examples: salt water, air, brass Heterogeneous mixtures do not have the same composition throughout. Examples: lake water, soil
6
Solutions A solution is one type of matter dissolved in a liquid or gas. It is a mixture that is completely uniform throughout (homogeneous). Examples: Salt water Sugar water
7
Suspensions Suspensions are heterogeneous mixtures. The different pieces can be mixed together, but they will eventually settle out. Examples: Muddy water Oil and vinegar salad dressings Liquid antibiotics
8
Colloids Colloids are mixtures that are similar to both solutions and suspensions. The particles will not separate, but the particles are visible in the mixture. They can be seen when a light is shown onto the mixture. Examples: Milk Fog Whipped cream
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.