Chemical reactions only occur when reacting particlescollide with each other with sufficient energy.
The minimum amount of energy required to cause a reaction is the activationenergy
How does temperature affect the rate of reaction?
In a hot reaction mixture , the particles move more quickly - so they collide for often with greater energy , so more collisions are successful
How does concentration affect the rate of reaction?
At higher concentration , more particles are crowded closer together , so they have less space to move - they collide more often so there are more successful collisions
How does surface area affect the rate of reaction?
Small pieces of a solid reactant have a higher surface area to volume ration than large pieces of a solid reactant - More particles are exposed and available for collisions , so there are more collisions and a faster reaction
