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The aim of the experiment that I am carrying out is to see how the difference in temperature affects the rate of CO2 production.

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Chemistry Coursework Plan Aim The aim of the experiment that I am carrying out is to see how the difference in temperature affects the rate of CO2 production. Fair Test * To make this experiment completely fair I am going to put the exact same mass of marble chip in the conical flask every time I carry out the experiment. * I am also going to keep the concentrations of the same each time I carry out the experiment * I will make sure that my readings are accurate by taking them every 10 seconds. I will ensure that the volume of hydrochloric acid stays the same at all times so they will not react too fast or too slow. * Also I will make sure that there is exactly the same amount of water in the measuring cylinder each time I carry out the experiment, I will do this to ensure that I get the most accurate results possible, I am going to make certain that there is no air bubbles. * I will keep the surface area of the marble chips the same each time. Equation CaCO3+HCl CaCl2+CO2+H2O calcium carbonate + hydrochloric acid calcium chloride + carbon dioxide + water Range of Results I am going to use 3g of marble chip I am going to use ...read more.


I am going to do my experiment from 20 to 60 at 10 intervals; I am not going to go any higher than 60 because the reaction will take place too fast to record the result. Obtaining Evidence Safety * Goggles- To ensure that if there is spillages your eyes are protected * Stand up- You have always got to remain standing while doing the experiment so if an accident occurs then you can get away quickly * Make sure that the apparatus is not at the edge of the table to prevent any accidents * We do not use high temperatures because it would be very dangerous to deal with and anything over 100 will evaporate so the experiment would not be fair. Here are the results to my experiment. Temperature of Hydrochloric Acid ( ) Time taken for the CO2 to be produced (secs) Volume of CO2 produced (cm ) 1st reading Volume of CO2 produced (cm ) 2nd reading Average volume of CO2 produced (cm ) 20 10 2 3 2.5 20 20 3 5 4 20 30 5 7 6 20 40 8 9 8.5 20 50 13 14 13.5 20 60 18 19 18.5 20 70 24 24 0 20 80 30 31 30.5 20 90 34 35 34.5 20 100 41 40 40.5 20 110 48 49 48.5 Temperature of Hydrochloric Acid ( ) ...read more.


The bung is a very big issue because it is very hard to get the bung in the conical flask quick enough so there is gas lost. To prevent this happening could put the conical flask on a balance and measure the weight of the flask as CO2 is produced. For this experiment I did not get any anomalous results this shows that my results are reliable and shows that I can rely on my results. The results that I obtained are a good set, there is not a lot of difference between the first times I carried out the experiment and the second time I carried out the experiment, this also shows that my results are reliable. If I were to repeat the experiment I would use more reliable equipment like a thermostat to keep the temperature at a constant and I would put the conical flask on a balance so I could see volume CO2 is being produced more accurately. The change of equipment would make the experiment more accurate; this would make my results even more reliable. My experiment was a fair test. I did not have any difficulties throughout my experiment. If I were to do my experiment again I think that I would go above 60 to see if the volume of CO2 stays the same as at 60 of the reaction keeps getting faster. By Charlotte Fawell ...read more.

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