1. WARM - UP Update your Table of Contents
Write your homework – leave it to be stamped
Divide page 16 into 4 squares and label each square: Element, Compound, Mixture, Solution
Turn your Chemistry Rap into the basket or get ready to perform it!
Date
Session #
Activity
Page
1/11 11
Element, Compound, Mixture, Solution 4-Square 16
Balancing Act 17
Practice Equations 18

2. Study Jams
Video 1: Elements & Compounds
Video 2: Mixtures & Solutions

3. QUICK RECAP
Compounds, Mixtures, Solutions

4. Elements: MUST be on the Periodic Table OF ELEMENTS
Pure substances made of only one type of atom
Combine to form all other types of matter
Examples:
Silver
Calcium
Oxygen

5. Compounds: Two or more elements combine during a chemical reaction
Must be combined in definite ratios
Chemical Change/Reaction
Examples:
Water
Salt
Sugar

6. Mixture Combination of 2 or more substances
Basic mixtures are NOT the same throughout – heterogeneous
Do not have to be combined in specific ratios
Physical Change
Can be liquid, solid or gas
Different types:
Solutions
Suspensions
Colloids
Examples:
Soil
Fruit salad

7. Solution: A type of MIXTURE that is the same throughout - homogeneous
Solute- substance being dissolved
Solvent- substance doing the dissolving
Physical Change
Examples:
Salt water
Lemonade
Salt = Solute
Water= Solvent
Salt Water= Solution

8. Suspension: A type of HETEROGENEOUS MIXTURE
Particles will not dissolve, insoluble, or are suspended
Examples:
Italian dressing

9. Colloid: A type of HOMOGENEOUS SOLUTION Have an “in between” texture
Examples:
Jell-O
Pudding

10. Element, Compound, Mixture or Solution?
Cool Whip

11. Element, Compound, Mixture or Solution?
Sugar =

12. Element, Compound, Mixture or Solution?
Gold

13. Element, Compound, Mixture or Solution?
Pebbles

14. Element, Compound, Mixture or Solution?
Methane – CH4

15. Sum It Up!
Quick one question assessment to make sure you understand the difference between a compound, mixture and solution
Complete all parts of the assessment, make sure your name is on it and then bring it to me!

16. So, Matter Can Change Form When Combined, BUT…The BIG Question Is:
In a physical or chemical change, is new matter created, or does matter disappear?

17. Law of Conservation of Mass (Matter)
Matter cannot be created or destroyed, it can only change form
So where does the wood go?

18. Law of Conservation of Matter is the KEY to Balancing Equations!
NaF Na F
In other words, what goes in, must come out!

19. Chemical Reactions Reactants – Product –
Elements present at the beginning of a chemical reaction
Product –
Compounds formed by a chemical reaction

20. REACTANTS
PRODUCT

21. What are the Reactants? What are the Products?
NaF Na F
The arrow indicates that a chemical reaction has occurred

22. Balancing Chemical Equations
Since matter can neither be created nor destroyed, the amount of reactants must always equal the amount of product

23. Balancing Chemical Equations
Before (Reactants)
After (Product)
NaF Na F
Na = 1
Na = 1
F = 1
F = 1

24. But What If It Doesn’t? STOP, THINK, DISCUSS…
If you weigh your elements before a chemical reaction, and the compounds afterwards and they do not have the same mass before and after what likely happened during the chemical reaction?

25. Components of a Chemical Equation (Label your diagram)
Formula
Chemical
Formula 
2H2 + O2
2H2O
Coefficient
Subscript
Coefficient
Subscripts
(Reactants)
(Products)

26. What is that little number?
Subscript –
Shows how many atoms of an element are in a compound.
When there is NO subscript there is only 1atom of that element. O2
NH4
H2O
Li3F2
K5N4C2
NaCl

27. What is that big number in front?
Coefficient –
The number of molecules (compounds) involved in a chemical reaction H2 O2 H2
H2O 2 O2 2 H2

28. You must multiply…it is like the distributive property in math!
So the coefficient tells you the number of molecules, but what about each atom?
You must multiply…it is like the distributive property in math!
2NH4
5H2O
3O2
2Li3F2
4NaCl
2K5N4C2

29. Rules for Balancing Chemical Equations
1. You CANNOT change subscripts, ONLY coefficients
H2 + O H2O
2. It does NOT have to look the same on both sides, it only has to be balanced
3. You CANNOT split compounds to write in a coefficient:
HCl 2

30. Rules to Balancing Chemical Equations
4. Only multiply through when it is a compound because they have already bonded
2H + Cl HCl
NO YES
5. If it is a capital letter, they are each a separate element:
H, C, O
If it is a capital letter followed by a lower case letter, it is all one element:
Cl, Li, Si

31. Steps for Balancing Chemical Equations
1. Divide the reactants from the products with a line.
2. Write down the chemical symbol of each of the elements on each side of the equation
2 H2 + O H2O
H =
O =
H =
O =

32. Steps to Balancing Chemical Equations
3. Using the coefficients and subscripts write down the number of each element
4. If they are not balanced change the coefficients using trial and error. You will have to go back and forth between each side!
2 H2 + O H2O
H = 4
O = 2
H = 4
O = 2

33. Lets Practice
P4O6
P + O2

34. Lets Practice
Na2O
Na + O2

35. Lets Practice
Al + O2
Al2O3

36. Lets Practice
Cl2 + KI
KCl + I2

37. WARM - UP Update your Table of Contents
Write your homework – leave it to be stamped
Answer the following question in your notebook:
What is the Law of Conservation of Mass?
Date
Session #
Activity
Page
1/15 13
Law of Conservation of Mass Activities 19
Balancing Equations Practice 20

38. ANNOUNCEMENTS & REMINDERS
Tutoring on Tuesdays 8:15…please let me know if you plan on coming!
Bring your own technology (BYOT) laptops, iPads for Thursday

39. LAW OF CONSERVATION OF MASS (MATTER)
REVIEW
LAW OF CONSERVATION OF MASS (MATTER)

40. Law of Conservation of Mass (Matter)
Matter cannot be created or destroyed, it can only change form
What goes in, must come out!

41. Law of Conservation of Mass (Matter) Lab Investigation Roles
Group Leader – Responsible for reading and making sure the group is following directions accurately and completing all parts of the lab
Supply Manager – gets and returns supplies and makes sure they are clean
Measurement Technician – gets and returns the scale balance and is responsible for accurate mass measurements
Data Technician – makes sure the group records the mass data before and after the experiment, assists measurement technician in calibrating the scale

42. Law of Conservation of Mass (Matter) Lab Investigation
Send your supply manager to get the lab kit and measurement technician to get the scale balance
Group leader, read the directions carefully twice before starting!!
WARNING: YOUR BALLOON IS ALREADY FULL OF BAKING SODA, DO NOT TIP IT INTO THE GRADUATED CYLINDER ACCIDENTALLY!

43. Law of Conservation of Mass (Matter) Lab Investigation Clean-Up
Balloons in the garbage
Rinse graduated cylinder thoroughly
Wipe up any spills
Put all items back into your lab kit & put them on the counter
Put scale balance back onto cart
Make sure every group member has measurements and an explanation

44. Law of Conservation of Mass (Matter) Analyzing Reactions
Some chemical reactions are ENDOTHERMIC = absorb energy
Some chemical reactions are EXOTHERMIC = produce energy
How would you tell the difference?

45. Endothermic Vs. Exothermic
ENDOTHERMIC – An endothermic process absorbs heat and causes the temperature around it to cool – needs energy to occur
Photosynthesis (needs energy from the sun)
EXOTHERMIC – An exothermic process releases heat and causes the temperature around it to rise – occur spontaneously
Release heat, sound or light energy

46. REVIEW
BALANCING EQUATIONS

47. Rules for Balancing Chemical Equations
1. You CANNOT change subscripts, ONLY coefficients
H2 + O H2O
2. It does NOT have to look the same on both sides, it only has to be balanced
3. You CANNOT split compounds to write in a coefficient:
HCl 2

48. Rules to Balancing Chemical Equations
4. Only multiply through when it is a compound because they have already bonded
2H + Cl HCl
NO YES
5. If it is a capital letter, they are each a separate element:
H, C, O
If it is a capital letter followed by a lower case letter, it is all one element:
Cl, Li, Si

49. Steps for Balancing Chemical Equations
1. Divide the reactants from the products with a line.
2. Write down the chemical symbol of each of the elements on each side of the equation
2 H2 + O H2O
H =
O =
H =
O =

50. Steps to Balancing Chemical Equations
3. Using the coefficients and subscripts write down the number of each element
4. If they are not balanced change the coefficients using trial and error. You will have to go back and forth between each side!
2 H2 + O H2O
H = 4
O = 2
H = 4
O = 2

51. Lets Do One Together…
Na + O2
Na2O

52. Complete the Practice Worksheet

53. WARM - UP Update your Table of Contents
Write your homework – leave it to be stamped
Review the rules and steps to balancing equations because you will be given a Warm-Up Assessment with 5 equations
Date
Session #
Activity
Page
1/17 13
Technology Review Games –nothing to paste
XXXX

54. Equation 1- Balance Box Answer
P + O P₄O₁₀

55. Equation 2- Balance Box Answer
Cl₂ + NaBr NaCl Br₂

56. Equation 3- Balance Box Answer
Cs N₂ Cs₃N

57. Equation 4- Balance Box Answer
CuCl₂ + H₂S CuS HCl

58. Equation 5- Balance Box Answer
Al + HCl AlCl₃ + H₂

59. REVIEW You can work with a PARTNER, as some games require 2 players
Play the review games listed on the sheet given to you and your partner…if you get through all of them ONLY then can you search for alternate CHEMISTRY RELATED sites

60. EXPECTATIONS
I expect you and your partner to play only what you are supposed to without being disruptive in any way!!
When you are working with me you are expected to complete the equations

61. Lets Practice: Part D - #1
Na + MgF2
NaF Mg

62. Lets Practice: Part D - #2
Cl2 + KI
KCl I2

63. Lets Practice: Part D - #3
HCl + NaOH
NaCl H2O

64. Lets Practice: Part D - #4
Na + NaNO3
Na2O N2

65. Lets Practice: Part D - #5
PbBr2 + HCl
HBr PbCl2

66. Try 6, 7 & 8 on your own, and then check the answer key
REVIEW
Try 6, 7 & 8 on your own, and then check the answer key

67. Lets Practice: Part D - #6
Na3P + CaF2
NaF + Ca3P2

68. Lets Practice: Part D - #7
AlBr3 + K
KBr + Al

69. Lets Practice: Part D - #8
CaF2 + Li2SO4
CaSO LiF