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Rate Constant Calculator
Calculate chemical reaction rate constants (k) and half-lives
Formulas:
• Zero-Order: k = ([A]0 − [A]t) / t
• First-Order: k = (1 / t) × ln([A]0 / [A]t)
• Second-Order: k = (1 / t) × (1 / [A]t − 1 / [A]0)
• Zero-Order: k = ([A]0 − [A]t) / t
• First-Order: k = (1 / t) × ln([A]0 / [A]t)
• Second-Order: k = (1 / t) × (1 / [A]t − 1 / [A]0)
Reaction Parameters
Calculation Results
⚠️ Rate constants (k) are highly temperature-dependent as described by the Arrhenius equation ($k = A e^{-E_a / RT}$). Changes in temperature or the addition of catalysts will alter the rate constant, even if initial concentrations remain identical.