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An Investigation into the factors that affect the rate of reaction

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An Investigation into the factors that affect the rate of reaction Aim: Our aim is to investigate how different factors affect the rate of reaction. We will have to find which will give of the most carbon dioxide, in a reaction between hydrochloric acid and marble chips (calcium carbonate. i) Temperature: Temperature alters the rate of a reaction by supplying the reacting particles with more energy, the more energy in the reaction means the more energy the reacting particles with have which means the particles are moving around more which will increase the chances of a collision. Also the more energy they get from the heat the more the more energy the particles will have to react. Generally the greater the temperature the faster the rate of the reaction. This experiment could be fairly accurate but without an electric water bath the temperature can not be kept as constant as is needed, this will undoubtedly affect the results which leads to inaccuracies. ii) Concentration: Concentration effects the rate of a reaction because, the higher the concentration the higher the chance of a hydrochloric acid particle colliding with a marble chip. ...read more.


I think this because the higher the concentration of the acid molecules the more particles will be available to react with the marble chips. As the concentration increases the more hydrochloric acid particles will be in the solution, this increases the chances of a collision occurring which means that more carbon dioxide will be produced. Apparatus: 1 test tube, 1 gas syringe, 1 conical flask, 1 bung, 1 stop clock, tubing, hydrochloric acid and marble chips. Diagram: Method: After collecting and setting up the equipment the acid and the marble chips should be weighed or measured out the acid should be put in to the conical flask, then the stop clock should be ready and it is imperative that the gas syringe is pushed back to zero. Then when ready the marble chips should be placed in to the conical flask. As soon as all of the chips are in the flask the timer must be started, the results of the gas being given out must be checked and recorded every 10 seconds. ...read more.


The results from the two different experiments were helpful and proved my prediction. The results go up by similar amounts each time. Analysis of graph, the two graphs seem to be very similar which shows that there were no problems in the experiment. Conclusion: My results prove my prediction, the higher the concentration of acid the faster the rate of the reaction. This is due to the number of particles in the solution for the reactants to react with. My graph also proved my prediction further; this is a more visual proving. Evaluation: Overall I am pleased with my results and the way the experiment was carried out. I think my results were fairly accurate and proved my predictions. To make the overall experiment results more accurate we repeated it twice times and then took the average (on the graph). I do not think that there is any thing that I would change in our experiment, I might have repeated the experiment once more for accuracy if there was more time. I would also like to have had a more accurate means of taking the results and the stopwatch time, as there are inaccuracies that may occur. ?? ?? ?? ?? Luke Bebb 10AM ...read more.

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