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Rate of reaction
The change in concentration per unit of time of any one reactant or product.
Rate of reaction=
Change in concentration of a reactant or product / time
Instantaneous Rate
You plot a graph of volume vs time
Instantaneous rate at a particular point
Draw a tangent to a curve
To find the rate
Find the slope of the line rise/run
Why do Chemical Reactions occur?
When chemical bonds between atoms are formed or broken through effective collisions
Effective collisions
Collide with the right energy and the molecules are in the correct orientation for the reaction to occur.