1. Reaction Stoichiometry
Mass A to Mass B

2. Let’s Think About It… NO!
Your boss tells you to make 15 grams of sodium chloride.
How would you do it?
2 Na (s) + Cl2 (g)  2 NaCl
Can we just go from one number to the other?
9.10 g
15.0 g
NO!
Let’s Think About It…

3. The Key to Reaction Conversions
Mass A  Mole A  Mole B  Mass B

4. Mass A  Mole A  Mole B  Mass B
Aluminum metal and chlorine gas react to produce aluminum chloride.

5. Mass A  Mole A  Mole B  Mass B
2 Al (s) + 3 Cl2 (g)  2 AlCl3
a. How many moles of chlorine gas are needed to react with 1.5 moles of aluminum?

6. Mass A  Mole A  Mole B  Mass B
2 Al (s) + 3 Cl2 (g)  2 AlCl3
b. How many grams of AlCl3 will be produced if 2.50 moles of Al react?

7. Mass A  Mole A  Mole B  Mass B
2 Al (s) + 3 Cl2 (g)  2 AlCl3
c. How many moles of Cl2 must react to produce 12.3 g of AlCl3?

8. Mass A  Mole A  Mole B  Mass B
2 Al (s) + 3 Cl2 (g)  2 AlCl3
d. If 17 grams of aluminum react, how many grams of aluminum chloride will be produced?