1. Chemistry : An Introduction

2. The various parts of the scientific method

3. Student - centered Learning

4. Atom Combinations

5. Structure of Matter

6. Chemistry 140 Fall 2002
States of Matter

7. Classification of Matter
Can it be physically separated?
Homogeneous Mixture
(solution)
Heterogeneous Mixture
Compound
MIXTURE
PURE SUBSTANCE
yes no
Can it be chemically decomposed?
Is the composition uniform?
Colloids
Suspensions
Element

8. The composition of Air

9. Electrolysis The decomposition of water by an electric current, is a chemical process.

10. Separation of a sand-saltwater mixture

11. Filtration separates a liquid from a solid.

12. The solution is boiled and steam is driven off.

13. Laboratory Equipment

14. Laboratory Equipment
Laboratory equipment should never be removed from the labs. The equipment should never be used in a manner not described by your teacher. Unauthorized lab experiments are strictly forbidden. You may not use the lab without a teacher present and with your teachers permission.

15. Chemical Reaction Inquiry Lab: “Chemical Baggie Science”
Students are given the following three chemicals:
1. Calcium chloride - CaCl2 2. Sodium Bicarbonate - NaHCO3 3. Bromothymol Blue
They are also given a 10 ml graduated cylinder and plastic baggies. They are told that they must try every combination possible from the three chemicals that they are given. The reactions can be conducted in sealed plastic baggies. After making some initial observations, students must conduct an experiment of their choice based on the scientific method.

16. Elephant’s Toothpaste
Hot Pack/Cold Pack Lab
Locate the chemicals that are in hot packs and cold packs.
Demonstrate how the packs work by performing two different kinds of reactions.
Endothermic and Exothermic
Elephant’s Toothpaste
Mix: Saturated Solution of Manganese Dioxide with 12% solution of Hydrogen Peroxide and detergent. You can add stripes of food coloring for dramatic effect.