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FRcTORS -14 AFFéCT THE RATE OF C) CH€mtcAL REACTION.
The factors that affect reaction rates are: surface area of a solid reactant concentration and pressure of a reactant temperature presence/absence of a catalyst.
Effect of temperature on the rate The rate of a chemical reaction can be changed by altering the temperature. If the temperature is increased: reactant particles move more quickly they have more energy the particles successfully collide more often.
VACCINE. Effect of concentration and pressure on rate The rate of a chemical reaction can be changed by altering the concentration of a reactant in solution, or the pressure of a gaseous reactant..
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H3C CH3. Effect of catalysts The rate of a reaction can be increased by adding a suitable catalyst. They speed up a reaction by reducing the activation energy or by changing the reaction mechanism.