1. STOICHIOMETRY

2. What is stoichiometry?
Stoichiometry is the quantitative study of reactants and products in a chemical reaction.

3. Mole Ratios
The proportions of reactants and products (the recipe) is referred to as the MOLE RATIO.
A mole ratio converts moles of one compound in a balanced chemical equation into moles of another compound.

4. Example Reaction between magnesium and oxygen to form magnesium oxide.
2 Mg(s) + O2(g) MgO(s)
Mole Ratios:
2 : 1 : 2

5. Practice Problems N2 + 3 H2 2 NH3
Write the mole ratios for N2 to H2 and NH3 to H2.
Butane (C4H10) is a fuel used in BBQ lighters. Write out a balance reaction equation for the complete combustion of butane.
A can of butane lighter fluid contains 1.20 moles of butane calculate the number of moles of carbon dioxide given off when this butane is burned.

6. Solving equivalent ratios, MEANS=EXTREMES
Mole-Mole Problems
Equation of reaction
2C4H O CO H2O
Mole ratio
C4H CO2
2 : [ from equation]
: X [ problem]
2 : 8 = 1.2 : X
Solving equivalent ratios, MEANS=EXTREMES
X = 4.8 mols of CO2 given off

7. Homework Read section7.1 Bottom half of handout from yesterday
Page 319 #1-3
Questions on pg 320 if more practice needed