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Investigating the rate of reaction of Magnesium and Hydrochloric acid.

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Introduction

Gavin Martin Investigating the rate of reaction of Magnesium and Hydrochloric acid Plan: I am going to perform the above experiment by changing certain variables to procure enough results to create a graph and a pattern. There are some variables that cannot be changed, such as room temperature and thickness and length of the magnesium. These would create results that would be hard to interpret. Doing this would create a fair test. To do is I will first start with 10cm3 of Hydrochloric acid to a piece of Magnesium 1cm long. The Magnesium will then be added and the time taken for it to react completely with the acid will be recorded. On the next experiment there will be 9cm3 of Hydrochloric acid to 1cm3 of Distilled Water. ...read more.

Middle

10 0 10.41 0.1 9 1 16.38 0.06 8 2 20.33 0.05 7 3 30.19 0.03 6 4 35.32 0.28 5 5 54.76 0.19 4 6 87.93 0.11 3 7 243.76 0.004 2 8 300+ n/a 1 9 300+ n/a 0 10 Infinity n/a I then put these results into graphs. Analysis: The results for this experiment can be used to very effectively show how the concentration of Hydrochloric acid can be used to affect the speed and rate of a reaction. The first graph I have drawn (Time - Concentration) shows excellently how much water (concentration) will affect how fast Magnesium will dissolve in Hydrochloric acid. It steadily slows down the speed of the reaction until it seems to break a sort of barrier, where at 7cm3 of water the difference between 6cm3 and 7cm3 is 153 seconds. ...read more.

Conclusion

This means they hit the magnesium more often and so the magnesium reacts faster. Therefore the magnesium takes lees time to disappear. Conclusion: To conclude I believe my experiment to have gone very well. It has shown how the reaction between Magnesium and Hydrochloric acid can be affected very easily by a few changes to the experiment. Concentration alone can make a great affect to all aspects of the experiment. The two graphs I have drawn are both good representations of the results that I concluded from my experiments. I have forgotten to mention that to keep the Magnesium from floating at getting non-correlating results I weighed it down with a paperclip. This would also cover up some of the Magnesium strip and so would slow the results down by a few seconds or more, as part of the surface area of the Magnesium would not be in contact with the acid. ...read more.

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