Chapter 2 Power Point
- 1. 2.1 and 2.2
- 2. Heterogeneous ● Heterogeneous is a type of mixture ● It is a mixture of different substances ● Some examples are sand, dirt, and mud
- 3. Homogeneous ● Homogeneous is a type of mixture ● It is when the substances are the same ● Some examples of homogeneous mixtures are water, tea, and coffee
- 4. Compounds ● A compound is a pure substance ● A compound is a type of pure substance
- 5. Elements ● An element's smallest particle is an atom ● An element is a type of pure substance
- 6. Pure Subsatnces ● Two examples of pure substances are compounds and elements ● It can not be broken physically, only chemically
- 7. Mixtures ● Two types of mixtures are Heterogeneous and Homogeneous ● They can be broken physically
- 8. Ways of Separ at ion
- 9. Distillation ● You use distillation when you are trying to figure out what a liquid substance is, or you are trying to separate two liquids. ● To do distillation you set up a distillation apparatus ● This is what a distillation apparat- us looks like:
- 10. Filtration ● Filtration separates two materials based on their particles and/or solubility ● To use filtration you set up something like this: ● You pour the mixture into the funnel and the filtrate, one of the materials, will drop down through the funnel and collect in the erlenmeyer flask and the other material will be isolated in the filter paper.
- 11. Evaporation ● Evaporation is a process used to isolate a solid dissolved in a liquid ● It's property is Solubility Important! ● You are only going to isolate a sample of the solid, because the water evaporates into the air.
- 12. 2.3
- 13. Chemical Change vs. Physical Change Ways you can tell whether a chemical change or a physical change is occurring ● If you can get the original object back, it is a chemical change. Like when a paper is burning, you can't get the original sheet of paper back. ● If you can get the original object back, it is a physical change. Like when you add salt to water, you could filter it and get the original water back.
- 14. Flammability ● Flammability is the ability to burn in the presence of oxygen. ● Qualitative ● It is a chemical change
- 15. Reactivity ● How readily a substance combines chemically with another substance. ● Qualitative
- 16. If you crack a plastic swing is it a chemical or a physical change?
- 17. If you bleach a blue shoe, is it a chemical or physical change?
- 18. If you rip a paper is it a physical or a chemical change?
- 19. If you burn a square of fabric is it a chemical or physical change?
- 20. If you melt a candle is it a chemical or a physical change?