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Does Temperature Affect The Rate Of Reaction

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Introduction

Does Temperature Affect The Rate Of Reaction? Aim To find out if the temperature of hydrochloric acid affects the rate of reaction with magnesium. Prediction I predict that as the temperature of the hydrochloric acid increases so will the rate of reaction therefore the time taken for the reaction between the hydrochloric acid and the magnesium to be completed will decrease. Theory As there is more heat energy added to the H+ ions will collide with each other more frequently thus causing an increased rate of reaction between the acid and magnesium. Hydrochloric acid + Magnesium Hydrogen + Magnesium Chloride 2HCL + Mg H2 +MgCL2 Apparatus * Magnesium * Hydrochloric acid * Thermometer * Bunsen burner * Test tubes * Test tube holder * Measuring cylinder * ...read more.

Middle

23 23 33 31 43 22 53 23 63 28 73 23 83 20 2nd set of results Temperature (oc) Time taken for magnesium to dissolve (seconds) 26 21 36 33 46 25 56 22 66 19 Analysis There was no trend from the first set of results, there a number of reasons why this may have happened. This was a fault in the experiment. In the second set of results the trend was the higher the temperature the quicker the rate of reaction apart from the first result which was an anomaly. In the first set of results my prediction did not apply, I would never have expected these results, they were so mixed up. ...read more.

Conclusion

This may affect the time taken for the magnesium to fully dissolve * As you carry out the experiment the acid has time to cool down (after heating) * Sometimes the magnesium would stick to the side of the test tube You could improve this experiment by using these methods: * To solve the temperature problem, use a controlled environment and change the temperature of that environment so the acid will not cool down. * Use a template to cut the magnesium into equal strips In my experiment there was one anomaly it was the first result in my second set at 26oc it took 21 seconds for the magnesium to fully dissolve but it then took the magnesium 33 seconds to dissolve at 36oc from then on the trend was the higher the temperature the quicker the reaction. ...read more.

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