CHEMISTRY GLOSSARY
half-life of a reactant
poluživot reaktantaFor a given reaction the half-life, t1/2, of a reactant is the time required for its concentration to reach a value that is the arithmetic mean of its initial and final (equilibrium) value.
Half-life is constant for first-order reactions.
t1⁄2 =
ln 2
k
Half-life is not constant for second-order reactions but rather it varies with initial concentration and k.
t1⁄2 =
1
k·[A]o
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Generalic, Eni. "Half-life of a reactant." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. 1 Apr. 2025. <https://glossary.periodni.com>.
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