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# How temperature effects the speed of the reaction

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Introduction

Separate Skills Aim I am trying to find out how temperature effects the speed of the reaction: Mg + 2HCl � MgCl2 + H2 The reaction can be effected by many different factors these are listed below: * Heat * Concentration * Pressure The variable I am going to change is heat and the rest of the variables I will keep the same. Prediction I predict that as the temperature increases the speed of the reaction will increase. This is because as the temperature increases the bonds between the magnesium particles weaken and the particles move around more (vibrate more) as the particles have been given more heat energy. This means that the particles will break more easily, therefore becoming far more susceptible to form bonds with other particles in the displacement reaction. ...read more.

Middle

we will know that the reaction has stopped, because hydrogen will only flow out of the tube when there is reactions between the magnesium and chloride particles. Measuring and experiment details To investigate temperature change I will need to the change the temperature of the mixture in the reaction. I will complete 6 different experiments each at a different temperature, starting at 10�C going upwards in 10 �C intervals up to 60�C; I will repeat each experiment. I will get the correct temperatures for the mixture for each experiment by placing the beaker with the acid in, into an individually set water bath for each experiment. Once the acid is at the correct temperature I will add it to the appropriate place in the pre-set position in the experiment apparatus shown above. ...read more.

Conclusion

I could have also done the experiment under more precise and constant conditions (e.g. if the room temperature for all the experiments was exactly 20.6�C). I could have also completed more repetitions of the experiments; this would have made the results more reliable. Also when heating the acid you are not heating the metal. So when the medal is added to the acid in the experiment set-up there could be a temperature change in the mixture causing inaccuracies. I believe that all the results taken were good, none were anomalous. The only result that could be slightly anomalous is the 1st result taken at 10�C, but this is only slightly different to the second result, and when the average is taken the chart and line of best fit evens out well. The evidence strongly confirms my prediction, it is clear that as the temperature increases the reaction time decreases. This proves my theory and I am happy with the way the experiment has been undertaken. ...read more.

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