FACTORS AFFECTING REACTION RATE

CONCENTRATION

NATURE OF THE REACTANTS

CATALYSTS

PRESSURE

TEMPERATURE

SURFACE AREA

The more concentrated the solution, the faster the reaction rate.

increasing temperature --> increase rate of reaction

Because it increases the amount of collisions.

example: reaction that cause foods to spoil occur faster at room temperature than in refrigerator

Increasing the surface area of a reactant speeds up the rate of reaction by increasing the collision rate between reacting particles

A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process. Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism.

1- Phase: Reactions with solids are slower.

2- Reactions involving ionic compounds are faster than covalent compounds.

Enzymes: are protein molecules in cells which work as catalysts.

high kinetic energy

more collisions

higher % of particles have minimum energy

SARA R

SARA R

SARA R

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LAYLA I

LAYLA I

LAYLA I

High pressure increase reaction rate