Rates Of Reaction Definitions
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Define reaction rate.
Reaction rate is defined as the change in concentration per unit time of either a reactant or product.
List the factors that affect rate of reaction.
Nature of reacting substances. Surface area of a solid, concentration of a solution, pressure of a gas, temperature and catalyst.
Define catalyst.
A catalyst is defined as a substance that increases the rate of the reaction but remains unchanged at the end if the reaction.
Explain collision theory.
Collision theory is a model that explains that a reaction will only proceed when reactant particles collide effectively. An effective collision is one in which the colliding reactant particles have: • the correct orientation • sufficient energy (ie kinetic energy equal to or greater than the activation energy.
Explain the relationship between rate of reaction and the number of effective collisions per unit time.
Directly proportional.