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The Effect Of Concentration On A Reaction Rate With Hydrolic Acid Over The Magnesium Chip.

2498 words - 10 pages

The effect of concentration on a reaction rateAim: In this experiment I have been offered a choice to investigate absolutely anything that I desire to see the diverse effects therefore I have decided to investigate the concentration of the hydrochloric acid with the magnesium chip. I will be altering the concentration of the acid to explore the rates at which it reacts with magnesium, and to see at which concentration more quantity of hydrogen gas is emitted. Besides this investigation there are other key variables that could be used such as the size of the magnesium chips, increasing the temperature, increasing the surface area of the magnesium chip and a catalyst could be used.Introduction: In my experiment the reactants are hydrochloric acid and the magnesium strip. The chemical reaction takes place when the magnesium strip is dropped into the hydrochloric acid. During this reaction the products that are formed are magnesium chloride and hydrogen gas and the symbol equation for this reaction is:Mg + 2HCl = MgCl2 + H2The word equation:Magnesium + Hydrochloric acid = Magnesium Chloride + HydrogenMagnesium is a solid; hydrochloric acid and magnesium chloride are aqueous and hydrogen is in the form of a gas.Magnesium reacts with hydrochloric acid, because it is higher in the reactivity series to hydrogen. When the two chemicals react a displacement reaction usually takes place and the magnesium will displace the hydrogen in the hydrochloric acid forming magnesium chloride and hydrogen gas.Recording Results: There are several different ways in which I could record my results.I could measure the amount of gas evolved with a gas syringe then use these results to calculate the rate of the reaction.I could gauge the weight before and after the experiment by placing the conical with the volume preferred of the hydrochloric acid onto an accurate set of the electronic scales and record the weight. The weight of the experiment will decrease due to the displacement of the hydrochloric acid being released as the hydrogen gas. Although the difference isn't very big but still there is a change.I could also measure the duration of time it takes for the magnesium to dissolve in the solution but there is a problem with measuring the reaction this way because I can only calculate the average rate of reaction and not the initial rate.Factors: There are many different factors from which my experiment could be affected by such as the concentration of the acid because the higher the concentrations therefore there are more particles of the reactant present in the same volume.The temperature of the acid also has a greater impact on the reaction rate because if the starting temperature of the acid is different each time then the speed of the particles and the energy they have to collide with the magnesium strip will vary as well therefore it wouldn't be a fair test.The surface area of the magnesium will also affect the reaction rate as the bigger the surface area the...

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