1. Grab binders, handouts & returned work & begin the Do Now
Set you Periodic Tables at the corner of your desk for it to be checked by Ms. Herndon
Turn in your completed EXIT TICKET 2 & HW 1 to the class bucket.
Take 5 minutes to prepare for today’s quiz on bonding & chemical vs. physical reactions & properties

2. Quiz 1 45 min to complete (we will track immediately after)
DO NOT write on the quiz, write answers on separate sheet of paper
When finished turn in the quiz upfront, grab a colored pencil & calculator, and sit silently.
Things to Do:
HW 2
Lab 1: Copper Cycle Lab Report
Other course work

3. Reaction Equation Recap:
Phases
2H2O2(aq)  2H2O(l) + O2(g)
Reactants Products
1 reactant, 2 products
Chemical rxn NOT physical rxn

4. What types of chemical reactions are there?

5. Determining Types of Chemical Reactions
Arrange the slips into groups
HINT: There are 5 groups with 3 slips in each
Questions to consider:
What are your reactants and products?
How many reactants are there?
How many products are there?
Consider how the different reactions differ and how they are similar

6. Decomposition (8, 9, 14)
Description: a compound breaks down to simpler products
General Equation:
AB  A + B
Example:
2NaCl  2Na + Cl2
Question: More products than reactants?

7. Synthesis (6, 11, 13)
Description: 2 or more simpler reactants join to form a compound
General Equation:
A + B  AB
Example:
2Na + Cl2 2NaCl
Question: More reactants than products?

8. Single Exchange (3, 7, 15)
Description: a single atom replaces another atom in a compound
General Equation:
A + BC  AC + B
Example:
2Na + CuCl 2NaCl + Cu
Question: Do we see a single element on both sides?

9. Double Exchange (2, 4, 12)
Description: atoms in compounds switch partners and end with 2 new compounds
General Equation:
AB + CD  AD + BC
Example:
NaCl + LiBr NaBr + LiCl
Question: 2 compounds of reactants and as products?

10. Combustion (1, 5, 10)
Description: a CH compound burns in O2 to form CO2 and H2O (water)
Example:
C2H4 + 3O2 2CO2 + 2H2O
Question: are CO2 and H2O products?

11. Counting Atoms in Compounds
Step 1: Identify your elements in the compound Step 2: Distribute your subscripts Step 3: Distribute your coefficients across all elements a. 4PO4 b. 6C3H8O2 c. (CH4) 2N2

12. Counting Atoms Guided Practice
How many atoms of each element are in the following molecules?
1. H2SO4
2. CaOH2
3. NaCl
4. (NH3)3PO4
5. 3H2O

13. 1. 2 hydrogen, 1 sulfur, 4 oxygen 2. 1 calcium, 1 oxygen, 2 hydrogen
Answers
1. 2 hydrogen, 1 sulfur, 4 oxygen
2. 1 calcium, 1 oxygen, 2 hydrogen
3. 1 sodium, 1 chlorine
4. 3 nitrogen, 9 hydrogen, 1 phosphorus, 4 oxygen
5. 6 hydrogen, 3 oxygen