1. SCIENCE STARTER
What are three signs that a chemical change has occurred? Give 1 examples of a physical change Give 1 example of a chemical change

2. What is the simplest form of matter?
2.2
Classifying Mixtures
FORMS OF MATTER
What is the simplest form of matter?

3. Element: Simplest form of matter that has a unique set of properties Chemists use chemical symbols to represent elements. One or two letters, first letter always capitalized

4. COMPOUNDS
Compounds are composed of 2 or more elements chemically bonded together. They are represented by chemical formulas. You know there are 3 elements because they are capitalized.

5. Practice with elements and the periodic table

6. Which elements and how many of each are contained in the formula
Ba3(PO4)3

7. This is the formula for cream of tarter used in baking
This is the formula for cream of tarter used in baking. How many elements are in the formula and how many atoms of each element? KC4H5O6

8. If a compound is one or more elements combined, what is a mixture?

9. 2.2
Classifying Mixtures
A mixture is a physical blend of two or more components. Each component of a mixture retains it’s identity.
You can choose the amount of each item you select from a salad bar. So your salad is unlikely to have the same composition as other salads containing the same items.

10. 2.2
Classifying Mixtures
Based on the distribution of their components, mixtures can be classified as heterogeneous mixtures or as homogeneous mixtures.

11. Heterogeneous Mixtures
2.2
Classifying Mixtures
Heterogeneous Mixtures
A mixture in which the composition is not uniform throughout is a heterogeneous mixture.

12. Another name for a homogeneous mixture is a solution.
2.2
Classifying Mixtures
Homogeneous Mixtures
A mixture in which the composition is uniform throughout is a homogeneous mixture.
Another name for a homogeneous mixture is a solution.

13. MIXTURES
COMPOUNDS
Not in a fixed ratio
Separated physically- use physical properties
Individual components retain their properties
Elements in a fixed ratio (formula)
Separated chemically
Different properties than elements that compose it. (ex. NaCl)

14. REVIEW
Write a definition for how you would distinguish between an element, compound and a mixture
What is the difference between a homogenous mixture and a heterogenous mixture?

15. Which box(s) represents an
Element? explain
2. Which box(s) represents a
Mixture? Explain
3. Is mass an intensive or extensive property?

16. Separating Mixtures 2.2 How can mixtures be separated?
Differences in physical properties can be used to separate mixtures

17. How could a mixture of aluminum and iron nails be easily separated?

19. 2.2
Separating Mixtures
Filtration
The process that separates a solid from the liquid in a heterogeneous mixture is called filtration.
A colander is used to separate pasta from the water in which it was cooked. This process is a type of filtration.
A colander is used to separate pasta from the water in which it was cooked. This process is a type of filtration.

20. 2.2
Separating Mixtures
Distillation
During a distillation, a liquid is boiled to produce a vapor that is then condensed into a liquid.
A distillation can be used to remove impurities from water. As liquid water changes into water vapor, substances dissolved in the water are left behind in the distillation flask. Inferring What can you infer about the boiling points of substances dissolved in the impure water?

21. Distinguishing Elements and Compounds
2.3
Distinguishing Elements and Compounds
Breaking Down Compounds
A chemical change is a change that produces matter with a different composition than the original matter.
When table sugar is heated, it goes through a series of chemical changes.
C6H12O6 → 6 C H2O
When table sugar is heated, it goes through a series of chemical changes. The final products of these changes are solid carbon and water vapor.

22. Look at your notes and write the formula for percent error
LAB – Separating
Goggles
Be careful with materials- you are responsible for what is on your tray
Materials ruined = can’t finish lab= bad grade
GRADING – HOW WELL CAN YOU SEPARATE A MIXTURE- PORTION BASED ON PERCENT ERROR
Look at your notes and write the formula for percent error

23. CHANGES TO LAB- WRITE DOWN
You will receive your salt and sand separate – not in a mixture
Get the mass of salt and sand separately – record on data table
Make your mixture
Complete the rest of the lab according to the directions.

24. Define extensive and Intensive properties
SCIENCE STARTER
Define extensive and Intensive properties
Give an example of each
How can compounds be separated?
How many elements are in the formula H2SO4
Extensive – varies as sample varies Intensive- will not vary if sample changes

25. What kind of property is Combustion?
Science starter
What kind of property is Combustion?
What kind of property is malleability?
What type of mixture is beef stew?
What type of mixture is tomato soup?

26. SCIENCE STARTER
3 things you know well for today’s test 3 things you are unsure of for today’s test