1. Do Now:
Explain this joke.

2. Let’s make some visual models with M&M’s
You will be able to…
8.5(D)  recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing subscripts;
8.5(F)  recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of mass.
Key
Red-Chlorine
Orange-Sodium
Yellow-Oxygen
Green-Hydrogen
Blue- Carbon

3. Review: How to make a molecule…
Formula
Visual model
H2O
Subscript
No Subscript,
There is only 1
atom of oxygen in
the molecule

4. Review: How to make a molecule…
Formula
Visual model
H2O
No Subscript,
There is only 1
atom of oxygen in
the molecule
Subscript
H2O2

5. Review: How to make a molecule…
Formula
Visual model
6 H2O
Coefficient- How many molecules you have.

6. H2O
1 molecule of H2O

7. 3 H2O
3 molecules of H2O

8. Let’s make some visual models with M&M’s
You will be able to…
8.5(D)  recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing subscripts;
8.5(F)  recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of mass.
Key
Red-Chlorine
Orange-Sodium
Yellow-Oxygen
Green-Hydrogen
Blue- Carbon

9. Let’s now model another chemical equation with our M&M’s…
Reactants
products
Chemical equation
C + O2 
CO2
Visual model +
Word equation
To yield
Number of atoms
1 atom carbon react with 1 molecule oxygen
1 molecule CO2
1 carbon oxygen
1 carbon oxygen

10. Is it a balanced equation? How do we know?
Reactants
products
Chemical equation
C + O2 
CO2
Visual model +
Word equation
Number of atoms
1 molecule CO2
1 atom carbon + 1 molecule oxygen
1 carbon oxygen
1 carbon oxygen

11. Law of Conservation of Mass
Matter is not created or destroyed, it just changes forms. In a chemical reaction…

12. Evidence of a chemical reaction: (chemical change)
Production of a gas (bubbling, fizzing or foaming)
A change in temperature or light (an energy change)
Appearance of a precipitate (solid material)
A change in color

13. More practice… Reactants products Chemical equation 2C + 2O2  3CO2
Visual model +
Word equation
To yield
Number of atoms
2 atoms carbon react with 2 molecule oxygen
3 molecules CO2
2 carbons oxygen
3 carbons oxygens
Is it balanced?

14. With a partner… Instructions:
Create visual models for the rest of the chemical equations.
Draw an label the visual models.
3. For each equation complete the following stem:
The equation is/is not balanced because…
Chlorine
Sodium
Oxygen
Hydrogen
Carbon
Color Key

16. The model above is best represented by:
H2O
2OH
HOOH
H2O2

17. The above model shows:
10 atoms
2 molecules
2CH3Cl
All of the above

24. 6CO2+ 6H20+ Sun’s light C6H12O6+6O2
The above reaction…
is photosynthesis
Is respiration
Transforms radiant energy into chemical energy
Both a and c.

25. Organic Molecules all contain…
Sulfur
Carbon
Oxygen
nitrogen

26. All of the following are organic molecules except…
C6H12O6
CH4
C6H6O
H20

30. Yesterday we…
 investigated how evidence of chemical reactions indicates that new substances with different properties are formed.

31. Evidence of a chemical reaction: (chemical change)
Production of a gas (bubbling, fizzing or foaming)
A change in temperature or light (an energy change)
Appearance of a precipitate (solid material)
A change in color

32. 12 atoms carbon+ 22 atoms hydrogen+ 35 oxygen atoms
A chemical equation tells the story of a chemical reaction. Our combustion reaction again…
Reactants
products
Physical properties
White crystal
To yield
Black crystal/powder
Gas produced
Chemical equation
C12H22O11 + 12 O2  
12 CO2 + 11 H2O
Visual model +
Number of atoms
12 atoms carbon+ 22 atoms hydrogen+ 35 oxygen atoms

33. Chemical Reaction Dehydration of sugar…
Reactants
products
Physical properties
White crystal
To yield
Black crystal/powder and white gas
Chemical equation
C12H22O11   
12 C + 11 H2O (vapor)
Visual model +
Number of atoms
12 carbons 22 Hydrogen 11 oxygen
12 carbons 22 hydrogens 11 oxygens

34. Chemistry Practice with Qwizdom Remotes
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