Chemistry
First Order Rate Constant
Calculate rate constant for a first-order reaction.
k = (2.303 / t) log([A]₀ / [A])
Formula Explanation
The integrated rate law for first-order kinetics.
Variables Explained
[A]₀ = initial concentration; [A] = concentration at time t.
Solved Example
If [A]₀ = 0.1 and [A] = 0.05 after 20 min, find k.
k = (2.303/20) log(2) ≈ 0.0347 min⁻¹.