OCR Chemistry Rates of Reaction Revision Notes

• 1The rate of reaction can be affected by factors such as temperature, concentration, surface area, and the presence of a catalyst.
• 2The rate can be measured by the change in concentration of reactants or products over time.
• 3Collision theory explains that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.
• 4The Arrhenius equation relates the rate constant of a reaction to temperature and activation energy.
• 5Graphical representations, such as concentration vs. time graphs, can illustrate the rate of reaction.

The rate of reaction tells us how quickly a chemical reaction happens. It can change based on different factors like how hot it is, how concentrated the reactants are, or if there's a catalyst present. By studying these rates, we can better understand and control chemical processes in labs and industries.