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How Does Temperature affect the Rate of a Reaction?

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Classwork 20th December 2003 G.C.S.E Science Coursework How Does Temperature affect the Rate of a Reaction? Introduction In this Investigation, I am trying to find out how Temperature affects the Rate of a Reaction. I plan to change the temperature of an Acid, but still using the same amount of concentration, and I will record how long it takes the different Acid temperatures to react with 1cm of Magnesium Ribbon. Method In my experiment I will firstly set up my apparatus / equipment. I am going to use 1.0 mol dm-3 as the concentration of the Hydrochloric Acid. 1cm of Magnesium Ribbon, and 20cm3 Hydrochloric Acid. In my Experiment I will record how long it takes for the Acid (which will be at different temperatures) to react with the Magnesium Ribbon. The different temperatures (degrees) ...read more.


I will do this by; 1. Making sure I have the same concentration of Hydrochloric Acid, for each Experiment. 2. Making sure I use the same length of Magnesium Ribbon. 3. Use a Measuring Cylinder, to get the volume required to the exact amount. 4. Use a stopwatch, so that I get the timing correct. Safety Precautions I will need to observe several safety precautions whilst conducting my experiment. I will need to wear goggles in case any acid splashes in my eyes and also observe the usual laboratory regulations, such as tucking bags away and stools under the benches. The following warning signs will also apply to me when I am conducting my experiment. Corrosive Flammable Harmful of Irritant Input / Output Variable INPUT VARIABLE What Variable am I changing? OUTCOME VARIABLE Which Variable am I going to measure? ...read more.


From my Scientific Knowledge I can explain why this happened. When two chemicals reacted, their molecules had to collide with each other with sufficient energy for the reaction to take place. This is known as the collision theory. The two molecules will only react if they have enough energy. By heating the Hydrochloric Acid, I raised the energy levels of the molecules involved in the reaction. Increasing the temperature meant that the molecules will also move faster. In Conclusion, I think that my data and results are extremely reliable, and that they correspond with my prediction. I carried out my investigation correctly, and to the best of my ability and followed all Safety procedures. I do not feel that in any way I may be able to improve my procedure, but from another persons view they may think I can improve my Investigation. G.C.S.E Science Coursework - December 2003 By Samir Khan 11LW ...read more.

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