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Rates Of Reaction Investigation Essay

1543 words - 6 pages

PlanningIn this experiment I am going to observe and record the reaction between Magnesium and Hydrochloric Acid. My aim is to find out how the rate of this reaction will be affected if we change the concentration of the Hydrochloric Acid.The rate of a chemical reaction is a measure of how fast the reaction takes place. It is important to remember that a rapid reaction is completed in a short period of time. An example of a fast reaction is an explosion, and an example of a slow reaction is rusting.In the experiment, the Magnesium reacts with the hydrochloric acid to create Magnesium chloride and Hydrogen. The balanced formula for this is:Mg(s) + 2HCL(aq) = MgCl2(aq) + H2(g)Magnesium + Hydrochloric Acid => Magnesium Chloride + HydrogenMagnesium will react with Hydrochloric acid, because it is higher in the reactivity series than Hydrogen. The Magnesium displaces the Hydrogen in the acid, so it forms Magnesium Chloride and Hydrogen gas.For a reaction to occur, the reactant particles (Magnesium and Hydrochloric Acid) must collide. Only a certain fraction of the total collisions are actually successful collisions though. The successful collisions have enough energy at the moment of impact to break the existing bonds and form new bonds, resulting in the products of the reaction. Increasing the concentration of the reactants bring about more collisions, and therefore more successful collisions, increasing the rate of reaction.Equipment* Magnesium Ribbon* Different concentrations of Hydrochloric acid (0.25, 0.5, 1.0, 1.5 and 2.0M)* Beaker* Measuring cylinder* Tube to carry the hydrogen into the measuring cylinder and a bung* A container full of water* Safety goggles* StopwatchMethodFirst, I will pour 50cl of 0.25M Hydrochloric acid into my beaker. I will then fill my container and measuring cylinder full with water, and put the measuring cylinder in the container of water upside down, with my finger over the end so that the water will stay in the cylinder, when it is put in the upside down position. I will then put one end of the hydrogen collecting tube in the upturned measuring cylinder, where the end is still submerged into the water, keeping the pressure so that the water stays inside it. Next, I will put the strip of Magnesium Ribbon inside the beaker with the Hydrochloric Acid in, and put the end of the tube with the bung, into the top of the beaker to collect the hydrogen. When the hydrogen created by the reaction goes through the collecting tube and into the measuring cylinder, it will bring the water level down, and then we will be able to observe and record how much hydrogen has been produced in the reaction. I will record the amount of hydrogen produced every 30 seconds up to 2 minutes and 30 seconds, in a table. I plan to repeat this in order to get three sets of readings.Once I have completed the experiment for all of the concentrations of acid, I will carry it all out again, to get a second set of results. From these, I make an...

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