Rates of Reaction :: GCSE Chemistry Coursework Investigation

Whether the strength of Hydrochloric acid will affect the speed of the come in of reaction when reacting with Magnesium Ribbon.I want to find out whether the strength of Hydrochloric acid willaffect the speed of the rate of reaction when reacting with MagnesiumRibbon.VariablesThere are twain important item-by-item variables in my investigation thefirst of which is the concentration of the Hydrochloric Acid usedduring the investigation. The concentration of the acid will partlydetermine how dissipated the reaction takes place, if we put some of theatomic number 12 ribbon into the HCL at 2 hoagie thus it might have simplydissolved within a few seconds and then I would not have had m torecord down any decent enough results to plot a graph with. The otherimportant independent variable that will affect the speed of the rateof reaction is the length of magnesium ribbon. We need to put enoughMg Ribbon into the HCL so that it doesnt run out straight away butalso so that the experimen t stops by itself once the gas syringe hasfilled up.The reasons for choosing these two independent variables are that itwould be too hard to try and find a catalyst for this experiment acatalyst is a substance that increases the rate of a chemical reactionwithout being consumed in the reaction. Finding a catalyst for thisparticular experiment could take months never mind the amount of timewe have been given for our experiment.The independent variable that I will change is going to be thehydrochloric acid, we will use 50ml of HCL at the following molarityconcentrations 2molar, 1.6molar, 1.2molar, 0.8 molar and 0.4 molar. Ihave decided to experiment with these different strengths of molarbecause I think it will give a wide set of results to put into agraph.The dependant variable I shall be measuring will be the time it takesfor the magnesium to completely react with the hydrochloric acid, Ishall record the times for individually concentration of hydrochloric acidthree times so that i t makes it a fair test.To ensure the investigation is fair we will use the same length ofmagnesium ribbon for all the different strengths of hydrochloric acidand the length will be the one that we picked out from the preliminaryexperiments. Another way in which we will apply the investigation fairwill be to carry out an experiment at each concentration ofhydrochloric acid three times so that we weed then get hopefully aroundthe same outcome from each experiment, and if there are any anomalieswe can try to explain why they happened.