The Effect Of Temperature On The Rate Of The Reaction

976 WordsFeb 16, 20164 Pages
Purpose: The activation energy lab centralized on observing the effect that temperature has on the rate of the reaction 6I- (aq) + BrO3- (aq) + 6H+ (aq) 3I2 (aq) + Br- (aq) + 3H2O while also using calculations to determine the value of the rate constant and the activation energy at different temperatures. The activation energy of a reaction is defined as the minimum amount of energy required to make the transition from reactants to products. Given that the rate constant is proportionally constant for an experiment, it changes with temperature. By keeping the concentrations of the reactants constant, the effect of temperature on the rate was able to be determined. Temperature generally increases a reaction rate given that particles require require a specific amount of energy to react. By increasing the temperature, more particles are able to collide with the required force in perfect geometry to cause a reaction, which will result in an increased reaction rate. An example of this includes milk turning sour much more rapidly in warmer conditions such as room temperature versus the cooler temperature of the refrigerator. Procedure & Observations: First approximately 250mL of water was added to a 400mL beaker and heated on a hot plate to 20-25C. As the water was heating, two test tubes were then prepared, test tube A which contained 10mL of 0.0100 M KI, 10 mL of 0.0010 M Na2SO3, and 10 mL of deionized water, while test tube B included 10mL of 0.0400 M KBrO3, 10 mL of
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