Limiting Reactant and % Yield

1
Limiting Reactant and Yield

• With your host
• Dr. Mike Daniel

2
Combustion of Octane

• Say you want to know the mass of carbon dioxide
  produced by the combustion of 1.00 gallons of
  gasoline.
• Using D (octane) .78 g/mL and converting
  gallons ? liters ?mL ?g I got
• 2950 g octane
• Combustion will react the gasoline with oxygen to
  produce carbon dioxide and water

3
Combustion of Octane

• Combustion will react the gasoline with oxygen to
  produce carbon dioxide and water
• Write the unbalanced equation
• Balance the equation
• Calculate the mass of CO2 produced

4
Combustion of Octane

• Calculate the mass of CO2 produced if 2950 g
  octane reacts with 9,000 g O2
• Gasoline combustion also produces
• CxHy, NOx, SOx, and CO
• Reduces CO2 actually produced

5
Reaction Stoichiometry Assumptions

• Reaction goes 100 to completion
• No Side Reactions
• Assume dont lose any reactant or product
• Theoretical Yield the yield predicted from the
  above assumptions
• Actual Yield the actual amount of product
  produced
• Yield Actual / theoretical X100