NEET Chemistry Equilibrium Cheat Sheet

Key Definitions

• Chemical Equilibrium: A state where the rate of forward reaction equals the rate of the reverse reaction. ✅

• Dynamic Equilibrium: Continuous processes occurring at equal rates in both directions. ✅

• Equilibrium Constant (K): Ratio of product concentrations to reactant concentrations at equilibrium. ✅

Important Concepts

Le Chatelier's Principle

• If a system at equilibrium is disturbed, the system shifts to counteract the disturbance. ✅

• Changes that affect equilibrium:

• Concentration

• Temperature

• Pressure

Types of Equilibrium

• Homogeneous Equilibrium: All reactants and products in the same phase. ✅

• Heterogeneous Equilibrium: Reactants and products in different phases. ✅

Reaction Quotient (Q)

• Used to predict the direction of the reaction shift:

• If Q < K, the reaction shifts right (toward products). ✅

• If Q > K, the reaction shifts left (toward reactants). ✅

Key Formulas

• K: Equilibrium constant

• [products]: Concentration of products at equilibrium

• [reactants]: Concentration of reactants at equilibrium

Q = [products] / [reactants]

• Q: Reaction quotient

Common Mistakes to Avoid

Common Mistake: Confusing K with Q; remember K is at equilibrium, Q can be at any point in the reaction.

Memory Tricks

Tip: "K = P/R" — K for products over reactants.

Key Diagrams

   Reactants ⇌ Products
       ↑      ↓
      (K)    (K)