DOWNLOAD HSEB NOTES ON REACTION RATE | CHEMISTRY
CLASS : 12
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Factors afecting reaction rates
Several factors afect the rate of a reaction. It is important to know these factors so that reaction rates can be controlled, e.g. to improve product yields and efciency in industrial processes:
- nature of reactants: substances have diferent chemical properties and therefore react diferently and at diferent rates
- concentration (or pressure in the case of gases): as the concentration of reactants increases, so does the reaction rate
- temperature: depending on the type of reaction (i.e. endothermic or exothermic) increasing the temperature can speed up (endothermic) or slow down (exothermic) the reaction rate
- catalyst: adding a catalyst will increase the reaction rate
- surface area of solid reactants: increasing the surface area of the reactants (e.g. if a solid reactant is finely broken up) will increase the reaction rate because there is more area for the reactants to touch and react with each other
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