stoichiometric
- Adjective:
- Relating to stoichiometry: Pertaining to the quantitative relationship between reactants and products in a chemical reaction, or more broadly, to the calculation of these quantities.
The adjective "stoichiometric" is used to describe a ratio, amount, mixture, or condition that corresponds exactly to the proportions defined by a balanced chemical equation or the laws of stoichiometry. It often implies an exact, theoretically perfect proportion.
- Adjective:
- The reactants were combined in a stoichiometric ratio for complete combustion.
- A stoichiometric mixture of air and fuel provides the most efficient combustion in an engine.
- The yield was lower than expected because the reaction was not stoichiometric.
"Stoichiometric coefficient": The number written before a chemical formula in a balanced equation, indicating its molar proportion in the reaction.
- In the equation 2H₂ + O₂ → 2H₂O, the stoichiometric coefficient of hydrogen is 2.
"Non-stoichiometric compound": A chemical compound that deviates from the fixed, simple whole-number ratios of atoms found in ideal stoichiometry, often due to defects in its crystal structure.
- Many transition metal oxides, like wüstite (FeO), are non-stoichiometric compounds.
Stoichiometry (n): The branch of chemistry concerned with the quantitative relationships between reactants and products in chemical reactions.
- Calculating the required mass of a reactant is a problem in stoichiometry.
Stoichiometrically (adv): In a manner relating to or according to stoichiometry.
- The reagents were mixed stoichiometrically.
- Quantitative (in the specific context of chemical proportions).
- Theoretical (when referring to the ideal ratio from an equation).
- Non-stoichiometric: Not conforming to fixed, simple whole-number ratios of elements.
- Off-ratio: Not in the exact proportion specified.
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of or relating to stoichiometry
