Free interactive chemistry · SIM-STOICH-001
Limiting reagent
Two reactants are mixed; one runs out first (the limiting reagent) and decides how much product forms.
Open the interactive simulation →How to use this simulation
- Enter or choose a balanced equation.
- Type the mass (g) of each reactant.
- Read the limiting reagent, the excess remaining and the theoretical yield.
- Look at the bars: moles used and left over.
What to notice
- Compare moles divided by the coefficients — not the masses.
- The excess reactant is left over when the limiting one is used up.
Try this
Find the masses that use up both reactants exactly.
Try it for free →