Grab binders, handouts & begin the Do Now5/3 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)

Parts of a Chemical Reaction Equation

C3H8(aq) + O2(g) 3CO2(g) + 4 H2O(l)

Balancing Reactions NotesKey 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

Balancing Reactions PuzzleTime Directions8 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

Balancing Reactions Notes

Steps to Balancing Reactions:1. Make an atom inventory of reactants and products2. Alter coefficients to balance atoms 3. Balance your HO’s last!

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)

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

The Mole & Molar Mass Notes

Which of the following doesn’t belong?• Dozen• Couple• Few• Baker’s Dozen• Ten

The Mole & Molar Mass NotesKey Point 1:• Mole = a counting unit • 1 mole = 6.02 x 1023 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!

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

Steps to Calculate Molar Mass of Compounds:

1) Count out the atoms in the compound2) Look up the Molar Mass for each

element3) Multiply the Molar Mass of each

element by the # present in the compound

4) Sum the Molar Masses

Calculate the Molar Mass of the following

1) NO2

2) SO2

4) (NH4)3PO4

3) C6H12O6

Calculate the Molar Mass of the following

1) NO2 = 46g/mol

2) SO2 = 64g/mol

4) (NH4)3PO4 = 149g/mol

3) C6H12O6 = 180g/mol

Lab 3: Aspirin LabQuestion:

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

HONORS: Mole Calculations

Moles Particles

Multiply by Avogadro’s Number

Divide by Avogadro’s Number

Exit Ticket 4Directions:

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.