Chemical Kinetics – Interactive Quiz & Cheatsheet

Learn about reaction rates, order, and molecularity through this fun and informative quiz tool

Updated: just now

Categories: Mini Game, Chemistry, Class 11, Physical Chemistry
Tags: Mini Game, Chemistry, Class 11, Chemical Kinetics, Rate Law, Activation Energy, Collision Theory
Post Thumbnail
Chemical Kinetics Cheatsheet & Quiz

Chemical Kinetics Cheatsheet

Cheat Codes & Shortcuts

  • Definition: Study of the rates of chemical reactions and the factors affecting them.
  • Rate Law: \( \text{Rate} = k [A]^m [B]^n \)
  • Order of Reaction: Sum of the exponents in the rate law (m + n).
  • Zero-Order: Rate = k, independent of concentration.
  • First-Order: Rate = k[A], exponential decay.
  • Second-Order: Rate = k[A]^2 or k[A][B].
  • Integrated Rate Law: Relates concentration to time.
  • Half-Life: Time for concentration to halve.
  • Arrhenius Equation: \( k = A e^{-E_a / RT} \)
  • Activation Energy: \( E_a \), energy barrier for reaction.

Quick Reference Table

Order Rate Law Integrated Rate Law
Zero \( \text{Rate} = k \) \( [A] = [A]_0 - kt \)
First \( \text{Rate} = k[A] \) \( \ln[A] = \ln[A]_0 - kt \)
Second \( \text{Rate} = k[A]^2 \) \( \frac{1}{[A]} = \frac{1}{[A]_0} + kt \)
Half-Life (Zero) \( t_{1/2} = \frac{[A]_0}{2k} \) Depends on initial concentration
Half-Life (First) \( t_{1/2} = \frac{0.693}{k} \) Independent of [A]_0
Arrhenius \( k = A e^{-E_a / RT} \) Plot \ln k vs 1/T for E_a

Advice

First Step: Always determine the order from experimental data or rate law.

Use Plots: Linear plots to identify order: [A] vs t (zero), ln[A] vs t (first), 1/[A] vs t (second).

Don’t Forget Units: Check units of k to confirm order.

Temperature Effect: Use Arrhenius equation for activation energy.

Verify: After finding rate law, confirm with half-life or integrated form.

Chemical Kinetics Quick Tips

  • Zero-Order: Rate constant, units M/s, half-life depends on [A]_0.
  • First-Order: Rate = k[A], units /s, half-life constant.
  • Second-Order: Rate = k[A]^2, units /M s, half-life inversely proportional to [A]_0.
  • Arrhenius Plot: ln k vs 1/T gives slope = -E_a/R.
  • Catalyst: Lowers E_a, increases rate without being consumed.

Chemical Kinetics Speed Quiz

Test your speed with 5 chemical kinetics questions! You have 30 seconds per question.