The Effect of Temperature on the Rate of Reaction

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The Effect of Temperature on the Rate of Reaction Aim-We is going to investigate how temperature effects the rate of reaction when we use a Magnesium Ribbon and dissolve it in Hydrochloric Acid. Different Variables-There are four different variables that effect the rate of reaction, surface area, concentration, temperature and catalysts. Here is some information on each variable with diagrams. How does surface area effect rate of reaction? In a substance the rate of reaction will be quicker if it has a large surface area. However, if it has a small surface area the rate of reaction is much slower. Rate of Reaction is much faster if the surface area is larger because much more of the reactant is exposed so particles will be able to collide with it. A greater collision rate means a faster reaction. How does concentration effect the rate of reaction? If more particles are added to a reactant, the concentration will become higher. If a concentration is higher, the rate of reaction will increase because there are more particles to collide. How does temperature effect rate of reaction? If a temperature is increased in a reaction the particles will be given more kinetic energy to collide. As a result the rate of reaction will increase because the particles will collide more frequently. How do catalysts effect the rate of reaction? Catalysts are added to chemical reactions to speed them up. Therefore the rate of reaction is faster. Catalysts work by reducing the activation energy to a minimum so the rate of reaction will be faster. The rate of reaction also increases with the smallest amount of energy when usi... ... middle of paper ... ... When a catalyst undergoes collision with the reactant molecules, less energy is required for the chemical change to take place, and hence more collisions have sufficient energy for reaction to occur. The reaction rate therefore increases. Catalyst Substance that alters the speed of, or makes possible, a chemical or biochemical reaction but remains unchanged at the end of the reaction. Concentration In chemistry, the amount of a substance (solute) present in a specified amount of a solution. Either amount may be specified as a mass or a volume (liquids only). The term also refers to the process of increasing the concentration of a solution by removing some of the substance (solvent) in which the solute is dissolved. In a concentrated solution, the solute is present in large quantities.
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