A-Level Chemistry Rates of Reaction Revision Notes

• 1The rate of reaction can be affected by factors such as concentration, temperature, surface area, and the presence of catalysts.
• 2The rate can be measured by the change in concentration of reactants or products over time.
• 3The collision theory explains that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.
• 4The rate equation relates the rate of reaction to the concentration of reactants, often expressed as rate = k[A]^m[B]^n.
• 5Catalysts increase the rate of reaction by providing an alternative pathway with a lower activation energy.

The rate of reaction tells us how fast a chemical reaction happens. It can change based on how much of each reactant you have, the temperature, how finely the solids are ground, or if you use a catalyst. By understanding these factors, we can control how quickly reactions occur in laboratories and industries.