Rate of gain and rate of loss aren’t always the same, depends on the molar ratios

• Collision theory

Effective Collisions

• Correct orientation of reactants
• Sufficient activation energy

• Representing the progress of a chemical reaction
• Activation energy and enthalpy
• Activated complex
• Potential energy diagrams

Factors Affecting Reaction Rate

• Nature of reactants
• Concentration
• Temperature
• Pressure
• Surface area
• Catalysts