Factors that effect rate of a reaction

• temperature

  When temperature increases of the reaction mixture ,the reactants particles gain kinetic energy and move faster. The particles collide more often with each other increasing the rate of the reaction
• Surface area

  If a lump is crushed, the surface area is increased. A larger area is now exposed to the other reactant particles. The frequency of collisions increases therefore so does the rate of reaction
• Concentration

  If the concentration increases the particle become more crowded. An increase in particle collision therefore increases rate of reaction.