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Investigate how altering the concentration of hydrochloric acid affects the rate of reaction between acid magnesium.

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David Bramall 10P 10A3 Mrs Shaw Chemistry Investigation. I am going to investigate how altering the concentration of hydrochloric acid affects the rate of reaction between acid magnesium. To do this I am going to make the acid more dilute by adding different amounts of water to it but keeping the original volume the same. Equation: Hydrochloric Acid + Magnesium � Hydrogen + Magnesium Chloride 2HCl + Mg � H + MgCl I think that the more dilute the acid is the slower the reaction will and the more concentrated the acid the faster the reaction will be. This is based on the collision theory because the more concentrated the acid the closer the particles will be (more compact together) so they will collide with the magnesium particles more which will result in a faster reaction. The more dilute the acid the further apart the particles will be so they will not collide as much which will result in a slower reaction. Dilute Acid Concentrated Acid Diagram. Method. 1. Measure 20cm 2M hydrochloric acid using a measuring cylinder. Put the acid into the beaker by using a dropper. 2. Add a piece of magnesium o the acid but measure it first to make sure it is 2.5cm in length if it is anymore in length cut it down to 2.5cm. ...read more.


8. If any substances come in contact with your eyes or mouth and you feel some irritation contact your doctor to seek medical advice. I will now put the results from my experiment into a table. These are the results from both times I did the experiment: Volume of 2M hydrochloric acid (cm ) Volume of water (cm ) Time in seconds for experiment 1 Time in seconds for experiment 2 20 0 26 25 16 4 40 59 12 8 143 144 8 12 156 170 4 16 660 670 10 10 77 87 I will now put both these sets of results into a graph to try and spot any patterns. As you can see from my graph there was an anomalous result both times I did the experiment so I will now do that particular one again and record the result I get. I will repeat it twice so I get more accurate results. These are the results of that particular section I repeated: Volume of 2M hydrochloric acid (cm ) Volume of water (cm ) Time in seconds for the 1^st repetition Time in seconds for the 2^nd repetition 12 8 138 141 As you can see they are still very similar to the result I got in the original experiment so it ...read more.


my experiment although I would have probably been able to achieve a lot more accurate results if I'd have used better equipment. I think I did collect enough results to make a suitable conclusion that backed up my prediction although with more results I could have come to a lot better conclusion and could have achieved a lot better investigation on the whole. I did refer to my exercise book and investigated more into the collision theory to come up with a more accurate conclusion although I didn't really need to refer to anything to see that my results were accurate enough for what I needed to find out. I would have repeated my experiment 3-4 times rather than twice to get a lot wider outlook and more suitable results although my results were quite accurate. I wouldn't do much in the way of changing my experiment because I used simple enough equipment and used my time appropriately enough so that I achieved accurate results and in general I was quite satisfied with the way the experiment went. If I was to ever do the investigation again I wouldn't change much that I did this time and would definitely refer to my method/ plan because I felt it made me achieve what I needed from the investigation. ...read more.

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