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Factors Affecting Reaction Rates

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Factors Affecting Reaction Rate Aim: To determine the factors which affect the reaction rate in a chemical substance. Theory: The rate of a chemical reaction can be defined as the increase in the concentration of one of the products per unit time or as the decrease in the concentration of one of the reactants per unit time. Rates of reaction usually decrease with time as the reactants are used up. Hypothesis: It is assumed that the rate of reaction will vary in different concentrations, temperature and different in various surfaces. Equipments: Test Tubes Graduated Cylinder Different pieces of zinc (pieces granulated and powder) ...read more.


Results and Conclusion: i) In the first one we observe that the reaction increases as the concentration increases. In the first tube with 0.1M almost nothing happens. In the second one with 1M we observe slight changes and small bubbles. The one with 6M of HCL is the one which reacted most vigorously. We could observe a lot of bubbling from the bottom of the tube and it dissociated pretty easily and quickly. This is because, the more concentrated the reactants the more collisions there will be per second per unit volume. So the rate of reaction increases as the concentration is increased. ii) ...read more.


C shows the difference of rate in different temperature. As the temperature increases the particles will move faster so there will be more collisions per second. Here where the zinc is put in the warm water the reaction happens more quickly. However, the main reason why an increase in temperature increases the rate is that more of the colliding particles will possess the necessary activation energy resulting in more successful collision. We can conclude that when the concentration, temperature and surface area is increased the reaction rate increases. In each of these tests we can also observe that as the reaction takes place in a larger concentration and surface area they get warmer as well. This proves that an exothermic reaction place here. Thus we see that concentration, surface area and temperature are factors which affect the rate of reaction. ...read more.

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