1. Chemistry
Mrs. Welke

2. Math survey Syllabus Check your last math class
List the grade of that class
List the grade of 9th grade Physics (Fode’s class)
Syllabus
Calculator needed
No food or drinks
No phones, etc.
Grading
Labs
Safety Agreement

3. Chemistry: An Introduction
Unit 1
Chemistry
Mrs. Welke
Chemistry: An Introduction

4. Observations in Science
Qualitative
Observations made by using descriptive words to explain.
Quantitative
Observations made by using numbers and/or measurements to describe.

5. Candle Lab Practice your observation skills
Make 10 qualitative observations
Be sure to write each partners name on the sheet you hand in.

6. Pricing Equipment Use chrom book Find each piece of equipment listed
Use the web site of your choice
flinnsci.com is great
Find each piece of equipment listed
You choose the quality of the style you choose
No plastic (except funnels or test tube racks)
List the price on one of each item
If they come as a quantity, divide to determine the price of one!
Total the equipment

7. Measuring liquids is done by reading the volume at the bottom of the meniscus.

8. Electronic scales
When using the scales:
Push on/off
Wait until 0.00 g appears
Place massing paper on the scale
Push zero to return the scale to 0.00 g and ignore the mass of the paper

10. Lab Safety Perform labs when teacher present Read lab carefully
Know the location of safety equipment
Wear safety goggles
Long hair up & proper clothing
Keep lab counter clean
Check all chemical labs multiple times
Never taste lab materials
Wash hands before touching eyes!

11. Lab Safety When instructed to smell, fan vapors
Never look down into a test tube
Report all lab accidents!
Chemical splashes flush with water 15 minutes
Minor burns place under cold water
Dispose of chemicals as instructed for each lab
Return equipment & chemicals to designated locations
Clean up! Turn off gas, Turn off water, Clean counter, Clean sink, Place key on board
Wash hand before leaving

12. Safety Agreement You need to read & sign
Your parent needs to read & sign
List parent contact information
Due back to me before Wed. 9/13

13. Scientific Method Observation made that makes you wonder
Formulate a hypothesis, an educated guess
Design and conduct an experiment to gather data through observations
Organize the data to look for regularities (Scientific laws are formulated, which are a summary of what is going on)
Wonder why the regularities exist (Scientific theories are developed, they are an explanation of what is going on)
Communicate findings to others

14. UNIT 1
Matter

15. Matter: It has mass & takes up space.
Composed of ATOMS
There are over 100 different types of atoms
Substance with only 1 type of atom is an ELEMENT
Substance made by bonding atoms together in a specific way is a COMPOUND
Smallest unit of a compound, made of 2 or more atoms bonded together is a MOLECULE
If made of 2 atoms of the same element, it is called a diatomic molecule (H2 O2 N2 F2 Cl2 Br2 I2 )

16. Signs of a Chemical Reaction
Color change
Change in temperature
Formation of a gas (look for bubbles)
Formation of a precipitate
(precipitate is a solid formed when mixing 2 liquids together)

17. Observation & Experiment
Wear safety glasses
Look for signs of a chemical change
Conduct each of the 7 individual experiments
(bmeans to use that chemical)
Write down qualitative observations
All chemicals can go down the drain

18. Physical properties – Chemical properties
The ability of a substance to undergo a specific chemical change. Example: Wood burning to give off gases, heat, and ashes.
A characteristic of a substance that can be observed or measured without changing the substance’s composition. Example: odor, color, volume, state, density, melting point, boiling point

19. Physical Change - Chemical Change
A change in the form of a substance, but not in its chemical nature; chemical bonds are not broken in a physical change.
Ex: Solid water (ice) melting to form liquid water
Ex: sugar dissolving in water
The change of substances into other substances through a reorganization of the atoms; a chemical reaction. Bonds are broken and formed.
Ex: An explosion

20. Fractional Distillation: The process of separating the components of a liquid mixture that depends of differences in the boiling points (vaporization temperatures) of the components.

21. Petroleum has many components that humans use
Petroleum has many components that humans use. Each type of molecule will boil off at different temperatures, allowing for the separation of them. The smaller the molecule, the lower the boiling point.

22. Filtration:
A method for separating the components of a mixture containing a solid and a liquid.
Both distillation and filtration use physical properties to separate components that are mixed, but not chemically combined.

23. Chemical classifications
Technical: chemicals of purity adequate for commercial use
Pure or Practical: chemicals suitable for most laboratory requirements
Laboratory Grade: Chemicals conforming in purity to the US Pharmacopeia. Safe for human use unless label indicates otherwise.
ACS: Chemicals which meet the requirements of the American Chemical Society.
Reagent Grade: Highly purified chemicals suitable for research.
Least Pure
Most Pure

24. Globally Harmonized System of Classification and Labeling of Chemicals
These will not be on exam!

25. Learn some of the Names of Elements – Word Find
Find the full names of the elements
The word find contains the names of the first 103 elements
Find each name only once
Find 50 names

26. Review b and c See equipment
It is the middle quality chemical. It conforms to the purity of the US Pharmacopeia.
Always
Clean up after yourself!
Scientific Law
Methane gas by the wheel on the bottom, Atmospheric air by the barrel openings.
Smallest unit of a compound, made of 2 or more atoms bonded together.
White, solid, etc.
Color change, temperature change, gas formation, precipitate formation.

27. Pure composition
Variable composition

28. Homogeneous mixture
Solutions
Solid solution - Alloys
Mixture of metals
Gaseous solution
Liquid solution