The Difference Between The Temperature Of A Mixture With Hydrochloric Acid

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The independent variable for part A is the temperature of the reactant. The variable is manipulated by using three different temperature of reactant to be mixed with hydrochloric acid. One of which is in room temperature (24°C) , the second one heated to 40°C and the other cooled for five minutes forming an 8°C mixture. The dependent variable is the time taken for cross mark to disappear from sight. This will indicate the rate of reaction. The shorter the time needed, the higher the rate of reaction. From the graph drawn above, we can see that as the temperature of the reactant decreases, the time taken for the cross mark to disappear increases. Therefore, the higher the temperature of the reactants, the higher the rate of reaction. As mentioned above, chemical reaction can only occur if the reactant particles collide and achieve an equal or larger energy than the activation energy. Based on this experiment, a higher temperature means that more heat energy is supplied to the reactant particles. The heat energy is converted to kinetic energy of the reactant particles making them move faster and collide at a higher speed. This allows the reactant particles to possess more energy which can exceed the activation energy. Consequently, the frequency of collision increases and the frequency of effective collision also increases. This indicates that more collision can result in a chemical reaction. More products are formed per unit time and the rate of reaction is high. Since
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