This site is designed to help students calculate theoretical and percent yield. There are links at the bottom of this page for additional tutorials, such as how to balance equations,
etc.
PLEASE NOTE: LINK TO CRITIQUE IS FOUND AT THE BOTTOM OF THIS PAGE
The general mechanism for finding percentage yield is as follows: 1.
Balance the chemical equation 2. Find the limiting reagent 3. Find the theoretical yield 4.
Find the actual yield
5. Find the percentage yield
Percentage Yield = mass
of Actual Yield x 100%
mass of Theoretical Yield
1. Balancing The Chemical Equation:
The first step in finding theoretical and percentage yield is to balance the relevant chemical equation.
If you are unsure how to do this, click on the "How to Balance Chemical Equations" link below:
2. Finding The Limiting Reagent:
 this is the reactant which the product yield depends
on, as it is not in excess.
 To determine which reactant is
the limiting reagent
1(a). Divide the mass (in grams) of the reactant by its molecular weight (in g/mol) OR
1(b).
Multiply the amount used (in mL) by its density, then divide by its molar mass
2. Multiply the mass (your answer from steps 1(a) or 1(b)) by the number of moles of the reactant used in
the reaction.
Unsure of how to calculate molar mass or molecular weight? Click the link
below:
