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Chemical Reactions : Assignment

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Added on  2020-05-16

Chemical Reactions : Assignment

   Added on 2020-05-16

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Chemical Reactions 1CHEMICAL REACTIONSby [NAME]CourseProfessor’s NameInstitutionLocation of InstitutionDate
Chemical Reactions : Assignment_1
Chemical Reactions 2TASK 1: The Reaction between Hydrochloric Acid and Sodium Thiosulfate SolutionSodium Thiosulfate reacts with dilute hydrochloric acid to produce Sulphur (IV) oxide, Sulphur, and water. The Sulphur (IV) oxide gas produced is soluble and will completely dissolvein an aqueous solution. The Sulphur, however, is insoluble and exists as a yellow precipitate which mostly gives the solution a milky appearance (Kotz et al., 2012). This milky appearance makes the mixture opaque, and the opaqueness can be used to measure the reaction rate. The word and chemical equations below show what happens when sodium thiosulfate is added to hydrochloric acid.SodiumThiosulfate+HydrochloricAcid→Sulphur+SodiumChloride+SulphurOxide+WaterNa2S2O3(aq)+2HCl(aq)→S(s)+2NaCl(aq)+SO2(g)+H2O(l)Effect of Increasing the Temperature on the Rate of ReactionTwo separate test tubes of sodium thiosulfate and hydrochloric acid are placed in a water bath controlled at a particular temperature. The two reagents are then added to a test tube, and a stopwatch started, and the rate of reaction studied. This can be done by drawing a mark X on a plane paper above which the beaker with the reagents is placed. The reaction is complete when the mark is no longer visible. From the experiment, it is evident that an increasing the temperature leads to an increase in the rate of the reaction. This is because raising the temperature increases the energy of the particles of the reagents thus moving around more quickly. The rate of the collision between the particles thus increases which consequently increases the reaction rate. This reaction is a precipitation reaction which forms a cloudy solution. As the temperature rises the speed at which
Chemical Reactions : Assignment_2
Chemical Reactions 3the precipitates forms becomes faster thus the mark X disappears at a more rapid rate as compared to when the temperatures are low. The Effect of Decreasing the Concentration on the Reaction RateIn this particular experiment, the goal is to investigate how the amount of concentration affects the rate of reaction. The reaction is timed at the moment when the solution becomes opaque, and the mark X becomes invisible. From the experiment, it is evident that the lower the concentration, the slower the reaction rate thus the reaction takes more time to reach an equilibrium. The phenomenon behind this reaction is that a dilute solution has fewer particles that take part in the reaction. The frequency of collision thus becomes slower which in return lowers the rate of reaction. If this happens, the mark X does not disappear fast. But in the case when the concentration is more, the amount of colliding particles also increases thus increasing the rate of reaction which results in a shorter time required to reach equilibrium (Huang, 2011). This reaction employs the theory of collision. In conclusion, it is evident from the above two experiments that increasing the temperature will increase the rate of reaction and vice versa while reducing the concentration also reduces the rate of reaction and vice versa. The Reaction between Hydrochloric Acid and Magnesium StripsMagnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas as shown the equation below;Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)The Effect of Increasing the Surface Area on the Reaction Rate
Chemical Reactions : Assignment_3

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