Chapter 9 - Stoichiometry
Stoichiometry - the process of using a chemical equation to calculate the relative masses of reactants and products involved in a reaction
Website about stoichiometry: http://www.chem4kids.com/files/react_stoichio.html
Limiting Reactant (or reagent) - the reactant that runs out first and thus limits the amounts of products that can form
Examples of limiting reactants: http://www.chem.tamu.edu/class/majors/tutorialnotefiles/limiting.htm
Actual yield - the amount of product actually obtained
Theoretical Yield - the amount of product obtained in a chemical reaction
The actual yield and theoretical yield are usually compared
How to calculate theoretical and actual yield: http://www.science.uwaterloo.ca/~cchieh/cact/c120/yields.html
Activities:
http://www.chemistry.wustl.edu/~coursedev/Online%20tutorials/Plink/Stoichiometry/stoichset.htm
Example:
LiOH + CO2 -> Li2CO3 + H2O
How many moles of Li2CO3 will be formed with 1000g of LiOH? Give percent yield.
Answer- 2LiOH + CO2 -> Li2CO3 + H2O
1000.00 g LiOH x 1 mol LiOH/23.95 g LiOH x 1 mol Li2CO3/2 mol LiOH
20.9 mole Li2CO3
10.1/20.9x100=48%
Website about stoichiometry: http://www.chem4kids.com/files/react_stoichio.html
Limiting Reactant (or reagent) - the reactant that runs out first and thus limits the amounts of products that can form
Examples of limiting reactants: http://www.chem.tamu.edu/class/majors/tutorialnotefiles/limiting.htm
Actual yield - the amount of product actually obtained
Theoretical Yield - the amount of product obtained in a chemical reaction
The actual yield and theoretical yield are usually compared
How to calculate theoretical and actual yield: http://www.science.uwaterloo.ca/~cchieh/cact/c120/yields.html
Activities:
http://www.chemistry.wustl.edu/~coursedev/Online%20tutorials/Plink/Stoichiometry/stoichset.htm
Example:
LiOH + CO2 -> Li2CO3 + H2O
How many moles of Li2CO3 will be formed with 1000g of LiOH? Give percent yield.
Answer- 2LiOH + CO2 -> Li2CO3 + H2O
1000.00 g LiOH x 1 mol LiOH/23.95 g LiOH x 1 mol Li2CO3/2 mol LiOH
20.9 mole Li2CO3
10.1/20.9x100=48%