Factors That Affect The Rate Of A Chemical Reaction

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There are five main factors that affect that rate of a chemical reaction. These are the surface area of a solid reactant, the concentration and pressure of a reactant, temperature, the presence or absence of a catalyst and agitation. There is also another factor which is able to affect the rate which is the nature of the reactants.
The surface area of a solid reactant can speed up a reaction. This is because if a physical change is made to the substance than the particles originally on the inside are now exposed and will react with other particles from another reactant.
The concentration and pressure of a reactant also affects the reaction time because the higher the concentration/pressure is the more likely it is for particles to collide with each other and cause a reaction. These collisions between particles are necessary for a reaction because it is what breaks bonds of particles and allows new ones to form.
The next factor is temperature. Increasing the temperature of a reactant will usually cause an increase in the rate of the reaction. This occurs because the temperature increases the energy, and hence speed of particles in liquids and gases. This increased energy level causes the particles to collide more frequently with each other and in doing so more chemical reactions are able to occur because of the increased amount of broken bonds and newly formed bonds.
The presence or absence of a catalyst also affects a chemical reaction because they speed up chemical
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