The limiting reactant is not a property of the chemical equation. It depends entirely upon how much you have of a given substance when doing a reaction. Finding the Limiting Reactant When Given Mass of Reactants Now that you know how to find the limiting reactant, take a look at this ...
This means that at some point you will use up one of the reactants, and the reaction will stop. This reactant is called the limiting reactant. In the example above, the cookies are the limiting reactant. The other reactant, the one there is plenty of, is called theexcess reactantor...