What is Stoichiometry?

Stoichiometry defines the quantitative relationships between reactants and products. It relies on the law of definite proportions and the law of conservation of mass to ensure that the atomic count remains constant throughout a reaction.

By converting mass to moles using molar mass, chemists can use stoichiometric coefficients to predict the yield of a reaction. This involves dimensional analysis to convert between grams, moles, and volumes of gases.

It is the foundation of analytical chemistry and industrial process control. It allows for the precise determination of limiting reagents, ensuring that reactions proceed to completion without excess waste.

Jeremias Benjamin Richter introduced the term in 1792, deriving it from the Greek 'stoikheîon' (element) and 'métron' (measure). His work laid the groundwork for modern quantitative chemistry.

In gas stoichiometry, ideal gas laws are used to calculate volume ratios. In laboratory settings, it is used to determine the exact amount of silver produced from a displacement reaction involving copper and silver nitrate.