First-Order Reactions by Horiya BOUKHATEM - Monday, 15 December 2025, 9:09 PM Number of replies: 0 · Derive: ln[A]t=−akt+ln[A]0 · Half-life: t1/2=ln2/a.k (independent of [A]0) · Application: Radioactive decay – why is it first-order? Permalink