1. I know you are SO happy you get to do stoichiometry again!
Gas Stoichiometry
I know you are SO happy you get to do stoichiometry again!

2. Two Types of Gas Stoichiometry Problems
STP gases
Non-STP gases

3. What to do? Write a reaction.
Find moles (gram-mole conversions, molarity, and ideal gas law)
Do a stoichiometric conversion between chemicals
Answer the question
22.4 L/mol for STP gases
PV = nRT for non-STP gases

4. Example #1
What volume of hydrogen gas will form at STP when 30.0 g of sodium react with an excess of hydrochloric acid, HCl?

5. Example #2
What mass of potassium chlorate will be needed to make 500. mL of oxygen at 25.0 oC and 800. torr?

6. Example #3
What volume (L) of oxygen will form when 40.0g of calcium chlorate decompose at 352oC and 901 torr?

7. Example #4
What volume of hydrogen at STP will form when 2.00 g of calcium react with an excess of water?

8. Limiting Reactant Gas Stoichiometry
Write a reaction.
Find moles for both reactants (gram-mole conversion, molarity, or ideal gas)
Determine limiting (divide by coefficients, choose smaller one as the LR)
Answer the question

9. Example #5
What volume of hydrogen will form at 30.0oC and 790. torr when 6.60g of zinc react with 30.0 mL of 6.00 M HCl?

10. Example #6
What volume of carbon dioxide at 300. oC and mmHg will form when 50.0 g of carbon react with 90.0 g of oxygen?

11. Example #7
What volume of hydrogen will form at 45.0oC and 750. mmHg will form when 45.0 mL of 0.500M sulfuric acid reacts with 30.0 g of calcium?