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see the rate of reaction when you have magnesium and add different molars of hydrochloric acid seeing how much gas is produced every ten seconds, recording the results, when it reacts with magnesium.

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Introduction

Rates of reaction - Coursework Aim: The aim of this investigation is to see the rate of reaction when you have magnesium and add different molars of hydrochloric acid seeing how much gas is produced every ten seconds, recording the results, when it reacts with magnesium. Equipment: * Delivery tube * 6* test tube * 6 pieces of Magnesium * 20 ml of hydrochloric acid (0M, 0.25M, 0.5M, 1.0M, 1.5M, 2.0M) * Tub of water * Measuring cylinder * Bung * Stopwatch Diagram: Method: 1. We have to set up the equipment. We do this by getting a tub of water. We then fill up the measuring cylinder and put our hand on the top and place in the tub without loosing any water. 2. Put Magnesium into test tube 3. Put the delivery tube into the measuring cylinder and the other end of the delivery tube into the test tube with the bung. 4. Add the Hydrochloric acid and start the stopwatch. 5. Record the results every 10 seconds so that we cans see how much gas is produced and the rate of reaction. 6. I will repeat each concentration 3 times. Fair test: This experiment will be a fair test this is because; when we add the Hydrochloric acid we are going to add the same amount each time of 20 ml. ...read more.

Middle

10 10 11 12 13 14 15 16 17 19 19 20 Average (ml) 10 11 12 13 14 15 16 17 18 20 20 21 C O N 1. Trial 1 (ml) 15 20 25 30 36 41 46 55 56 57 58 59 Trial 2 (ml) 15 22 28 35 41 47 50 54 56 57 58 60 Trial 3 (ml) 11 15 23 26 31 36 42 45 49 50 52 53 Average (ml) 14 19 25 30 36 41 46 51 54 55 56 58 C O N 1.75 Trial 1 (ml) 30 50 54 56 59 60 60 61 61 69 70 70 Trial 2 (ml) 34 46 51 56 57 57 57 57 57 59 61 61 Trial 3 (ml) 35 50 54 55 56 58 59 59 59 60 60 61 Average (ml) 33 49 53 56 57 58 59 59 59 63 64 64 C O N 2. Trial 1 (ml) 19 33 45 50 54 55 56 56 56 56 56 56 Trial 2 (ml) 21 36 46 50 52 55 55 55 55 55 55 55 Trial 3 (ml) 24 29 46 51 55 56 56 56 56 56 56 56 Average (ml) 21 33 46 50 54 55 56 56 56 56 56 56 Analysis: This graph shows the rate of reaction: The reason that I did the average times at 30 seconds ...read more.

Conclusion

It was unexpected that the molar 2 would react slowly because it is the largest molar. The original prediction that I made was that every time the molar goes up the more it will react. My prediction was proven correct; the reason that I said that for my prediction was because it was logical. I think that I was correct but for the concentration molar 1.75 and molar 2 I saw some difference it wasn't something that I was expecting but molar 1.75 ended up producing the most gas therefore my prediction wasn't entirely correct. Evaluation: I think that overall I had good quality results, but the anomalous results that I had where for the concentration molar 1.75 and molar 2 but most of the time there was a pattern. The reason that the results may be odd is because it could be either that the results where not read properly, or perhaps the concentration had been kept for too long and therefore it may not be as reactive as it would be if it was new. Overall I think that a firm conclusion would be to say that I think that the stronger the molar of the hydrochloric acid will react far greater with the Magnesium and therefore give off more gas. If in the future I have to do this practical again I would use a stand to hold up the measuring cylinder up so that the results can be seen clearly. ?? ?? ?? ?? Punam Nayee ...read more.

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