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sci.reaction-order-half-life Calculator
Calculates reaction half-life for zero, first, and second order kinetics from rate constant: t½ = [A]₀/(2k), ln2/k, and 1/(k[A]₀) respectively. First-order t½ is independent of concentration — radioactive decay and many drug eliminations follow first-order kinetics.
Inputs
K Rate
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
C0
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Order
Reference formula or conversion factor shown for context.
Results
half-life t₁/₂
Time for half the radioactive material to decay. After 10 half-lives, less than 0.1% of the original material remains.
90% conversion time t₉₀
The computed duration or time value.
reaction order n
Sample size or count used in the calculation.
half-life formula
Time for half the radioactive material to decay. After 10 half-lives, less than 0.1% of the original material remains.
concentration at t₁/₂
The proportional relationship between two quantities.