Chemical Kinetics notes
OpenThe 4 formulas you need for Chemical Kinetics, on one page.
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Chemistry · printable
Chemical Kinetics: One-Page Formula Sheet
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Last updated: 26 October 2026
Formula sheet
Chemical Kinetics formulas
Chemical Kinetics — formula sheet
Formulas
- First order: k = (2.303/t) log([A]₀/[A])
- t½ (first order) = 0.693/k; zero order: [A]₀/2k
- Arrhenius: k = A e^(−Eₐ/RT)
- log(k₂/k₁) = Eₐ/(2.303R)(1/T₁ − 1/T₂)
Key ideas
- Order is found from experiment; molecularity from the elementary step
- First-order half-life does not depend on concentration
- Catalysts lower activation energy, not ΔH
- A 10 °C rise often roughly doubles the rate
Traps to avoid
- Confusing order with molecularity
- Using first-order half-life for other orders
- Wrong units of k
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FAQs
Frequently asked questions
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