collision theory & activation energy

• what does the collision theory say about chemical reactions?

  chemical reactions can occur only when reacting particles collide with eachother & with sufficient energy
• what is activation energy?

  minimum amount of energy that particles must have to react
• explain how increasing concentration increases the rate of reaction

  • number of particles per unit volume increases
  • therefore the frequency of collisions increase
  • so if concentration increases, frequency of collisions increases
  • this increases the rate of reaction