![]() In contrast, reactions between molecules that require covalent bonds to be broken tend to proceed very slowly. Usually, no covalent bonds need to be broken in these cases. The attractive forces between the ions are broken and the ions become hydrated by the water molecules.Īdditionally, most ions exert attractive forces equally in all directions. It is because the molecular bonds in the molecules of reactants are broken down. ![]() These are: 1) The Nature of the ReactantsĬhemical reactions in an aqueous solution take place almost immediately. This is known as the Collision theory of Chemical Kinetics. The collision states that, in order for a reaction to happen, the reactants must collide with sufficient energy that is greater than the activation energy E a.īut there are some factors which can influence the rate of reaction, that is, increase the fraction of molecules with energies more than activation energy E a. There are four factors that influence the rate of a reaction. Therefore, the rate of a reaction is the change in concentration of a reactant or a product over a certain period of time.Ĭhemical reactions only happen when the reactant molecules collide with one another. We can measure the rate of a chemical reaction by measuring either: The study of the rate of reaction and factors affecting the rate of reaction is known as Chemical Kinetics.
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