1. Grab binders, handouts & begin the Do Now
1. When making soap all of my ingredients weighed 124g. According to the Law of Conservation of Mass, how much should my solidified bar of soap weigh?
2. Determine which of the 5 types of chemical reactions is shown for each
a. HCl + Mg à MgCl + H2
b. NaHCO3 + CH4CO2  CO2 (g) + H2O (l) + C2H3O2Na
c. Pb(NO3)2 (aq) + KCl (aq)  KNO3 (aq) + PbCl2 (s)
3. Make an atom inventory for the reactants in reaction (b) shown above.
4. Identify the atomic masses for each of the following elements: Hydrogen (H), Oxygen (O), Xenon (Xe), Calcium (Ca)

2. Parts of a Chemical Reaction Equation
C3H8(aq) + O2(g) 3CO2(g) + 4 H2O(l)

3. Balancing Reactions Notes
Key Point 1: - The law of conservation of mass is represented by balanced reactions # of atoms on the reactants side = # of atoms on the product side

4. Balancing Reactions Puzzle
Time
Directions
8 min
Complete “Identifying Balanced Reactions”; questions 1 – 4
5 min
With a partner, use M&M’s to balance our first unbalanced chemical reaction equation; questions 1 – 4

5. Balancing Reactions Notes
Steps to Balancing Reactions: 1. Make an atom inventory of reactants and products 2. Alter coefficients to balance atoms 3. Balance your HO’s last!

6. Balancing Reactions Notes
Directions: Balance the following equations:
1) HCl + Mg à MgCl + H2
2) NaHCO3 + CH4CO2  CO2 (g) + H2O (l) + C2H3O2Na
3) Pb(NO3)2 (aq) + KCl (aq)  KNO3 (aq) + PbCl2 (s)

7. The Mole & Molar Mass Notes
What do the following all have in common?

8. The Mole & Molar Mass Notes
Which of the following doesn’t belong?
Dozen
Couple
Few
Baker’s Dozen
Ten

9. The Mole & Molar Mass Notes
Key Point 1:
Mole = a counting unit
1 mole = 6.02 x particles
Tells us how many particles of a compound are actually involved in a reaction
602,000,000,000,000,000,000,000 particles
Avogadro’s Number!

10. Key Point #2: Molar Mass
Molar Mass = the mass of 1 mole of a substance
Tells us what mass of a substance is used in a reaction
Units = grams per mole (g/mol)
Example: 1 mole of Magnesum= 24g
Molar Mass of Magnesium = 24g/mol

11. Steps to Calculate Molar Mass of Compounds:
Count out the atoms in the compound
Look up the Molar Mass for each element
Multiply the Molar Mass of each element by the # present in the compound
Sum the Molar Masses

12. Calculate the Molar Mass of the following
1) NO2
2) SO2
3) C6H12O6
4) (NH4)3PO4

13. Calculate the Molar Mass of the following
1) NO2 = 46g/mol
2) SO2 = 64g/mol
3) C6H12O6 = 180g/mol
4) (NH4)3PO4 = 149g/mol

14. Lab 3: Aspirin Lab
Question:
Are brand name commercial prescription drugs better than generic or homemade prescription drugs?
Directions: 20 min…
- Determine the WHAT & HOW part of your purpose
- Draft your introduction
- Read the lab background and complete the hypothesis and Pre-lab questions

15. HONORS: Mole Calculations
Multiply by Avogadro’s Number
Moles
Particles
Divide by Avogadro’s Number

16. Exit Ticket 4
Directions: You have 5 minutes to complete the Exit Ticket to the best of your ability. You MAY NOT use notes, but you may use a Periodic Table. When finished submit to the class bucket and put up your binder.