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Step 4: Using the amount of limiting reactant initially present, calculate the amount of product that can be formed.
Once the limiting reactant is determined, the amount of product that can be produced can be calculated. Whichever reactant limits the reaction will react completly. Hence you can multiply the amount of the limiting reactant by the appropriate stoichiometric ratio to determine the amount of product formed.
If 200 g salicylic acid is added to 100 g acetic anhydride, which reactant will limit the reaction?
Recall that there are 1.45 moles salicylic acid and 0.980 moles acetic anhydride initially present and that the salicylic acid will limit the reaction.
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Clicking on formulas will give molecular weights.
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 In this example, how much aspirin (in grams) will be formed?
You can map out this problem like this:
Possible answers:
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