Definition - What does Stoichiometry mean?
Stoichiometry is the measure of the quantitative relationship between the products and reactants of a given chemical reaction in terms of their relative ratios of mass or volume.
Stoichiometry is the fundamental mathematical principle used to describe the law of conservation of mass, which states that matter cannot be created nor destroyed, but only converted from one form to another.
Corrosionpedia explains Stoichiometry
In order for a chemical reaction to occur and move to completion it must have a balanced stoichiometry. The quantity for each chemical element on the product side of the reaction should be equivalent to the corresponding element quantity on the reactant side in a chemical equation. For example, if a reaction originates with six carbon atoms, a total of six carbon atoms should still be present when the reaction completes, as it does in this balanced equation for photosynthesis:
6CO2 + 6H2O --> C6H12O6 + 6O2