1. Unit 4- Mixture and Compounds

2. Model So Far…..
Everything has been a simple “pure” particle…..

3. REVIEW FROM UNIT 1 Matter is anything made of atoms.c
Matter is anything made of atoms.
Matter has observable and measurable qualities.
Two basic types of properties of matter: physical properties and chemical properties.
All matter can undergo change: physical change or chemical change
Point out thing in the room, everything that you point at is matter

4. Properties REVIEW FROM UNIT 1
Physical properties can be observed without changing the substance (use your senses).
Chemical properties are determined by the make-up of a substance (only evident at the particle level).

5. Change RIVIEW FROM UNIT 1
Physical change- the original substance still exists (its particles are still the same); it has simply changed form.
Chemical change- takes place on the molecular level and produces a new substance (chemical changes are accompanied by physical changes) (hard to undo).

6. Water vs. Ethanol Property Water Ethanol Appearance Odor Flammability
Density
Melting Point
Boiling Point

7. What happens to the properties if I mix water and ethanol?
Solubility?
Density?
Boiling points?
Physical Change, not chemical

8. What happens if I mix sulfur (S) and iron (Fe) together?
Chemical Change
2 min video

9. Change and Properties
Physical change – mixed two particles together, but no reaction.
Some properties are the same as the original substance (MP and BP), and other are a mix of those properties (density).
Chemical change – mixed particles react to form a new product.
All the physical and chemical properties have changes.

10. Is the new product a mixture?
“Elemental”
“Compounded”

11. Examples: steel, air, water, vegetable soup
A type of matter
Examples: steel, air, water, vegetable soup

12. Examples: steel, air, water, vegetable soup
A type of matter
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous

13. Characteristics of mixture
Homogenous- “homo” same or alike
Heterogeneous- “hetero” different
Point out that they already have learned these prefix during our genetic unit.

14. A type of matter Homogeneous Heterogeneous Heterogeneous Mixture
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous
Heterogeneous Mixture

15. Heterogeneous Mixture
Heterogeneous mixtures – are composed of large pieces that are easily separated by physical means.
You can see with your eyes (you might need a microscope for some) that the composition is not the same throughout
Components are distinguishable
Examples: fruit salad, vegetable soup, etc.
Point out that they already have learned these prefix during our genetic unit. Demo 1

16. Heterogeneous Mixture
Point out that they already have learned these prefix during our genetic unit.

17. A type of matter Homogeneous Heterogeneous Homogeneous Mixture
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous
Homogeneous Mixture
Heterogeneous Mixture

18. Homogenous Mixture
Homogenous mixtures – looks the same throughout but can be separated by physical means.
If you break a piece of homogeneous matter into smaller pieces, each piece will have the same properties as every other small piece.
If you look at one of the pieces under a microscope, it is impossible to distinguish one part as being a different material from any other part.
Examples: air and glass

19. Homogenous Mixture

20. A type of matter Homogeneous Heterogeneous Homogeneous Mixture
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous
Homogeneous Mixture
Heterogeneous Mixture
Solution

21. Solution = Homogenous mixture
Everyday definition
Answer to a problem
A type of liquid
Chemistry
Solution – uniform mixture that can contain solid, liquid, or gases
Solution = Homogenous mixture
They are synonyms

22. How a solution is made? Solution consist of a solvent and solute.
Solvent – the substance that dissolves the solute to form a solution; most plentiful substance in the solution.
Solute- one or more substance dissolved in a solution.

23. Important vocabulary Soluble Insoluble
How a solution is made?
Important vocabulary Soluble Insoluble

24. A type of matter Homogeneous Heterogeneous Homogeneous Mixture
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous
Homogeneous Mixture
Heterogeneous Mixture
Solution
Solvent + Solute

25. A type of matter Homogeneous Heterogeneous Pure Substance
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous
Pure
Substance
Homogeneous Mixture
Heterogeneous Mixture
Solution
Solvent + Solute

26. Pure Substance
Pure Substance – Consists of only one component with definite physical and chemical properties.

27. A type of matter Homogeneous Heterogeneous Pure Substance
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous
Pure
Substance
Homogeneous Mixture
Heterogeneous Mixture
Element
Solution
Solvent + Solute

28. Element
Elements – composed of 1 type of atom

29. A type of matter Homogeneous Heterogeneous Pure Substance
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous
Pure
Substance
Homogeneous Mixture
Heterogeneous Mixture
Compound
Element
Solution
Solvent + Solute

30. Compound
Compound – is composed of two or more different elements chemically bonded together.

31. A type of matter Homogeneous Heterogeneous Pure Substance
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous
Pure
Substance
Homogeneous Mixture
Heterogeneous Mixture
Can be separated using physical means.
Compound
Element
Solution
Can be separated only by chemical means.
Solvent + Solute

33. Make a 4 column T chart Element Compound Homo. Mixture Heter. Mixture
Pure Substances
Mixtures
Element Compound Homo. Mixture Heter. Mixture
Have student write their guess down then go over it as a class.

34. Example for T chart Water Ethanol Water mixed with ethanol Sulfur Iron
Iron Sulfide
Sugar
Sea Water
Vegetable Soup
Orange Juice
Have student write their guess down then go over it as a class.

35. BIG IDEA
Everything has been a simple “pure” particle….. But now we need to illustrate matter as either a mixture (homo/hetero) or a pure substance (compound/element).

37. Separating Techniques
The primary concept of chemistry is the classification of matter.
You have learned that matter can be a pure substance or a mixture that is homogenous or heterogeneous.

38. A type of matter Homogeneous Heterogeneous Pure Substance
Examples: steel, air, water, vegetable soup
Homogeneous
Heterogeneous
Pure
Substance
Homogeneous Mixture
Heterogeneous Mixture
Compound
Element
Solution
Solvent + Solute

39. Why is this important to understand separation techniques?
Separating Techniques
Why is this important to understand separation techniques?
Bad Water
Discuss jobs that work with making solutions/purify solutions

40. Separating Techniques
Settling
Used to separate substances with different weights
Sifting
Used to sort solids by size.

41. Separating Techniques
Decanting: Used to separate an insoluble solid from a liquid by carefully pouring off the liquid. Based upon differences in density.

42. Separating Techniques
Filtration
Used to separate a liquid
and an insoluble solid.
Alum
Added to a liquid to promotes coagulation of suspended particles which is then filtered.

43. Separation Techniques
Evaporation: Used to separation of a liquid and a soluble solid.

44. Separation Techniques
Crystallization: Slow formation of a solid from a warm solution that is cooled.

45. Separation Techniques
Distillation: Used to separation two miscible liquids, that have different boiling points.
If two liquids are miscible they form a homogeneous mixture when added together.
Miscible = Mix
It is made possible due to the fact that each liquid has its unique boiling point.
5 min video
Crude Oil

46. Separation Techniques
Separating Funnel: used in separate the two immiscible liquids with different densities.
"water is immiscible with suntan oil”
“alcohol is miscible with water”

47. Separation Techniques
Magnetism: used to separate out any substance based on its magnetic properties.

48. Separation Techniques
Paper Chromatography: used to separate soluble substances from one another based upon differences in size as a solvent moves over paper.

49. Defining a process with
word you don’t know
Miscible Immiscible Soluble Insoluble

50. Why is this important
How is your drinking water cleaned?
5 min.