Stoichiometry Module: Limiting Reactants
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If 200 g salicylic acid is added to 100 g acetic anhydride, which reactant will limit the reaction?

Step 1: If reactant amounts are given in a unit other than moles, convert to moles.

Clicking on formulas will give molecular weights.

How many moles of salicylic acid are initially present?

0.724 moles 1.45 moles 27,600 moles

How do I convert grams to moles?

Good! To convert grams to moles, divide by the molecular weight:

Review conversion from grams to moles by clicking the icon above.







How many moles of acetic anhydride are present initially?

0.980 moles 1.96 moles 10,200 moles

Click to go back to equations with molecular weights.

Good! To convert grams to moles, divide by the molecular weight:

Review conversions from grams to moles by clicking the help button above.