1. Collision Theory
Reaction takes place when particles collide.
Animation:
http://
www.absorblearning.com/media/attachment.action?quick
=vs&att=2278

2. Collision Theory
In general, the more collisions, the
faster is the reaction.
However, this is not always true.
Why?
http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gate

3. As we can see … …
Collisions
Successful Unsuccessful
or or
Effective Ineffective

4. Therefore … …
 An effective (successful) collision will occur
if the particles are colliding with sufficient
amount of energy
 The more effective collisions there are, the
faster the reaction.