Limiting Reactant (4.3)
Percent yield
actual yield/theoretical yield times 100
actual yield
amount of product actually produced by a chemical reaction
theoretical yield
amount of product that can be made based off the amount of limiting reactant
To determine limiting reactant Step 1: grams to moles then use stoichiometric coefficients to switch moles , whichever one is smaller that is the limited reactant
g of compound A to moles of compound A g of compound B to moles of compound B take the moles of compound A and B and compare the stoichiometric coefficients of the reactants with the product
Step 2: Theoretical Yield : Convert the amount of product made by the limiting reactant to grams
mol of La * molar mass of product/mol of product
limiting reactant
reactant that is completely consumed in a chemical reaction and limits the amount of product
Excessive Reactant
reactant that occurs in a quantity greater than required