1. Warm Up: 3/1/13
1)What 2 pieces of information can you identify from a chemical formula? (Ex: H2O)
2)What is the name for the number written to the lower right of a chemical symbol? H2O
3)Determine the types and number of elements in each of the following chemical formulas:
a) NH4Br
b) Fe2O3
c) KNO3

2. Chemical Formulas PT 1) Hydrogen 2) H20 3) subscript 4) Chlorine
5) metallic
6) 1 nitrogen and 3 hydrogen
- 1 Barium and 2 Chlorine
7) Difference is what they are & their properties, Hydrogen Peroxide has 2 Oxygen

3. PT continued 8) 2 things - what atoms and how many Skillbuilder
a. CO2 - 1 carbon 2 oxygen
b. Ammonia - NH3 - 1 nitrogen and 3 hydrogen
c. calcite - CaCO3 - 1 calcium, 1 carbon, 3 oxygen
d. Potassium Hydroxide - KOH - 1 potassium, 1 oxygen, 1 hydrogen
e. Baking Soda - NaHCO3 - 1 Sodium, 1 hydrogen, 1 carbon, 3 oxygen

4. Chemistry Unit
Andolino & Williams

5. A Quick Review - Atom
Defined - smallest building block of a substance or element

6. A Quick Review -Molecule
Defined- smallest substance of a compound composed of one or more atoms chemically combined

7. A Quick Review Element
Defined - pure substance made up of only one kind of atom
All are listed on the Periodic Table of Elements
Examples: Calcium, Sodium, Nitrogen

8. A Quick Review - Compound
Defined - 2 or more elements that are chemically combined to make a new substance
properties of the elements used to make the compound are changed
Examples: Salt, Water, Alcohol

9. A Quick Review -Mixtures
Defined - 2 or more elements physically combined
elements used keep their original properties
Examples: salt water, trail mix, rice & beans, Pizza

10. Ways to separate a mixture
Boil to separate something that is dissolved in water
Strain (filter)- separate sand/gravel
Density differences- scoop off less dense material (salad dressing)
Magnet- separate magnetic things from a mixture

11. Chemical Formula Defined - way of writing one molecule of a compound
Shows THREE things
the elements that make up the compound
metallic element always goes first
the number of atoms of each element called Subscripts
H2O = the 2 is a subscript.
( H= 2 and O= 1)

12. Challenge...Round 1
With your table mates - represent the molecule projected on each slide.
Make sure you have the correct elements combined to make the compound
Make sure you have the correct number of atoms in each molecule to make the compound

13. Water - H2O 1 molecule of Water has... 2 atoms of Hydrogen
1 atom of Oxygen
Colorless, Odorless Gas
Colorless, Odorless Liquid
Colorless, Odorless Gas

14. Salt - NaCl a molecule of salt contains 1 atom of sodium
1 atom of Chlorine
White, Crystals, Edible
Shiny, Luster, Silver, Highly Reactive, Solid
Yellow, Vaporizes, Poisonous Gas

15. Ammonia - NH3

16. Chalk - CaCO3

17. Methane - CH4

18. Hydrogen Peroxide - H2O2

19. Glucose - C6H12O6

20. Butane - C4H10

21. Baking Soda - NaHCO3

22. Citric Acid - C6H8O7

23. Aspirin - C9H8O4

24. Caffeine - C8H10N4O2

25. Citric Acid - C6H8O7

26. Sugar - C12H22O11

27. Solutions- is a well stirred mixture
Contains a solute and solvent
Solvent- substance which dissolves the solute
Example: water, coffee or tea
WATER IS THE UNIVERSAL SOLVENT
Solute – substance that is dissolved into the solvent
Example: powdered drinks or sugar

28. Solute or Solvent?

29. Making a Solution

30. Your Turn….. Make a solution _____ + _____ = _________
_____ + _____ = _________
_____ + _____ = _________
_____ + _____ = _________
_____ + _____ = _________
_____ + _____ = _________

31. Solubility - how well a solute can be dissolved into a given amount of solvent
Depends on the temperature
Most substances become more soluble as the temperature increases
As temperature increases liquid particles can move faster and dissolve the solute at a faster rate
Example: Hot Coffee – sugar dissolves faster compared to an iced coffee

32. Depends on pressure - For gases only
Pressure Decreases - allows gas molecules to be farther apart
Gases become less soluble as the temperature increases (hotter). The more energy the particles have the harder they are to trap.
This is why soda goes “flat” after the cap has been removed.
Pressure Increases – allows more gas molecules to be close together
Gases become more soluble as the temperature decreases (colder). The less energy the particles have the easier they are to trap.
You tend to burp more when soda is cold!

33. Solubility graphs are used to summarize the solubility of different substances at a given mass (grams) of water as temperatures (º C) increase

34. ABOVE the line the solution is
SUPER SATURATED
BELOW the line the solution is UNSATURATED
ON THE LINE the solution is SATURATED

35. Chemical Reaction Reactants Products
Defined - process in which new substances with new chemical and physical properties are formed
Reactants
substance changed
Products
substance formed

36. What are chemical reactions?
165-assignment-discovery-chemical- reactions-video.htm

37. Are these chemical reactions?
Burning Paper
Rusting
Burning Gasoline
Digestion

38. Conservation of Matter
Defined - matter cannot be created or destroyed in a chemical change
Mass of Reactants
Mass of Products

39. Chemical Equations Reactants Products Na + Cl NaCl
Defined - describe chemical reactions in a simple way
"yield"
Reactants
Products
Na + Cl NaCl

40. Coefficient is the number of units involved in a chemical reaction.
2KI = the 2 represents a coefficient.
So, 2 KI units are involved in this reaction.
Or KI and KI
Examples:
2H2O
2NaCl
2CO2

41. Kinds of Atoms Number of Atoms Ag + H2S  Ag2S + H2 Ag H S
How do YOU balance this equation? Use the chart below
Kinds of Atoms
Number of Atoms
Ag + H2S  Ag2S H2 Ag H S

42. Unbalanced Equation
Kinds of Atoms
Number of Atoms
Mg O  MgO Mg O

43. Unbalance Equation
Kinds of Atoms
Number of Atoms
Cl2 + NaBr  NaCl Br Cl Na Br

44. Unbalanced Equation
Kinds of Atoms
Number of Atoms
CuCl H2S  CuS HCl Cu Cl H S

45. Catalyst Lab