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Gas Stoichiometry

Gas Stoichiometry. I know you are SO happy you get to do stoichiometry again!. Two Types of Gas Stoichiometry Problems. STP gases Non-STP gases. What to do?. Write a reaction. Find moles (gram-mole conversions, molarity, and ideal gas law) Do a stoichiometric conversion between chemicals

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Gas Stoichiometry

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  1. 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 1000. 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?

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