1. Define mole ratio (What is it? How is it determined?)
Q of the Day
In your own words:
Define mole ratio (What is it? How is it determined?)
Day

2. Define mole ratio (What is it? How is it determined?)
Q of the Day
In your own words:
Define mole ratio (What is it? How is it determined?)
Day PERIOD 3

3. Q of the Day
At STP 44.8 liters of water vapor were produced via a composition (synthesis) reaction. How many moles of O2 were used?
Day PERIOD 1

4. Practice Period 1
2Al(s) + 3CuCl2(aq)  2AlCl3(aq) + 3Cu(s)
According to the reaction above if you start with about 27 grams of aluminum how much copper should you produce (in grams)?
What is this calculation called?

5. 4NH3(g) + 6NO(g) 5N2(g) + 6H2O(l)
Stoichiometry
Reaction Stoichiometry – relates quantities of reactants and products in chemical reactions
Mole ratio – conversion factor that relates the amounts in moles of any two substances involved in a chemical rxn
Example:
4NH3(g) + 6NO(g) N2(g) + 6H2O(l)

6. Stoichiometry Mole ratio – just another player in the conversion game
- Used to change from one substance to another
- Does NOT change units
- Does change substance

7. Converting: Molar mass = Avogadro’s number = Avogadro’s law = =
Mass to moles
Moles to mass
Moles to atoms / molecules / particles
Atoms / molecules / partilces to moles
Moles to liters
Liters to moles
Changing a substance =
Avogadro’s number =
Avogadro’s law = =
Mole ratio

8. Mole ratios are exact – do not limit sig. figs.
Stoichiometry
Mole ratio – just another player in the conversion game
Mole ratios are exact – do not limit sig. figs.

9. 4NH3(g) + 6NO(g) 5N2(g) + 6H2O(l)
Stoichiometry
4NH3(g) + 6NO(g) N2(g) + 6H2O(l)
__?__
Start with 20 mols NH mols N2
Start with 20 grams NH moles NO
Start with 20 grams NO grams N2

10. 4NH3(g) + 6NO(g) 5N2(g) + 6H2O(l)
Stoichiometry
4NH3(g) + 6NO(g) N2(g) + 6H2O(l)
__?__
Start with 20 mols NH molecules N2
Start with 20 grams NH molecules NO
1.5e25 molecules N2
1.1e24 molecules NO
Start pd 1

11. STEPS FOR SOLVING: Identify the Balanced chemical equation
Identify what you know and what you need to know
Get an idea of what you need to do
Start your conversion

12. Q of the Day
At STP 44.8 liters of water vapor were produced via a composition (synthesis) reaction. How many moles of O2 were used?
Day PERIOD 3

13. Stoichiometry
If you produce 116 grams of sodium chloride by reacting sodium and chlorine how many mols of sodium must you have used?
2Na + Cl2 → 2NaCl
116 g NaCl = ____ mols Na
answer = 2 mols Na

14. Stoichiometry
Cupric chloride decomposes and 127 grams of solid copper form. How many liters of chlorine gas are produced at STP?
CuCl2 → Cu + Cl2
127 g Cu = ____ liters Cl2
answer = 44.8 liters Cl2

15. Limiting Reactants
Limiting Reactant – the reactant that limits the amounts of the other reactants that can combine and the amount of product that can form in a chemical reaction – the one you will run out of
Excess Reactant – any substance that is not used up completely in a reaction – left over

16. Assignment

17. SOLVE: 1.5e24 molecules of SO2 = ____ grams of SO2? S2 + 2O2  2SO2
Q of the Day
SOLVE: 1.5e24 molecules of SO2 = ____ grams of SO2?
S2 + 2O2  2SO2
And how many moles of S2?
Day

18. LAB