Reaction Half-Life (0th, 1st, 2nd Order)
Calculate the half-life and remaining concentration for zero-, first- and second-order reactions, free online.
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Half-lives: zero order t½ = [A]₀ ÷ 2k; first order t½ = ln 2 ÷ k (independent of concentration); second order t½ = 1 ÷ (k[A]₀). Optionally enter a time to find the concentration remaining.