LImiting Reactant and Percent Yield What is used up in and stops a chemical reaction? Opercent yield limiting reactant theoretical yield excess reactant

## Step 1<br />In a chemical reaction, the reactants are the substances that undergo a chemical change to form a product. The reactants are consumed during the reaction.<br /><br />## Step 2<br />The limiting reactant is the reactant that is completely consumed in a chemical reaction. It determines the maximum amount of product that can be formed.<br /><br />## Step 3<br />The limiting reactant is the reactant that stops the reaction because it is completely consumed. Once the limiting reactant is used up, the reaction stops.