Guide to Stoich
By: Hoa Le
Butane and Oxygen yields Carbon Dioxide and Water
Type of Reaction : Combustion
To identify that it is a combustion, the reactant has to be O2 with anything else.
Real Life Examples
Butane is founded in many fossils. One example would be putting gasoline into your car.
Butane are used in outdoor gas-powered grills.
Butane is often combined with propane to form a product called liquid propane gas, which can be used in camping stoves.
Butane is a common fuel used in inexpensive cigarette lighters.
Molar masses of each reactant
Molar masses of each product
Carbon Dioxide - 44.009g
(15.999x2) + 12.011
Water - 18.015g
(1.008x2) + 15.999
Moles to Mole Conversion
How many moles of Carbon Dioxide can you make if you have 11.30 moles of Butane?
- Start with your given (11.30 moles of Butane)
- Look at coefficients, this will be your Stoichiometric Ratio. ( 2 to 8 or 8 to 2)
- To cancel Butane out and find out how many Carbon Dioxide there are, put Butane on the bottom and Carbon Dioxide on top.
- Multiply across the top and divide by the bottom.
11.30 moles of Butane | 8 moles of CO2 ----> (11.30 x 8)
---------------------------------------------------------- = -------------------- = 45.20 moles of CO2
~~~ (leave blank) ~~~~ | 2 moles of Butane
Mass to Mass Conversion
If you have 7.04g of Butane, how many grams of Carbon Dioxide can be produced?
1. Start with your given (7.04g of Butane)
(7.04 x 1 x 8 x 44.009)
------------------------------- =21.3 g of CO2
(58.124 x 2 x 1)
Limiting and Excess Reactants
Do mass and mass conversions of first reactant (Butane) with first product (CO2) and second reactant (Oxygen) with first product (CO2) also. The one with the least mass will be the Limiting Reactant (LR).
Theoretical Yield
The theoretical yield is a number of grams (equal to the limiting reactant) of a substance or element that should be produced. In this case, the theoretical yield of Carbon Dioxide is 10.3 grams.