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I am going to see how long it will take the Calcium carbonate to neutralise the acid at different temperatures, I am going to see what will happen to the speed of reaction when I change the temperature

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Introduction

Plan I am going to see how long it will take the Calcium carbonate to neutralise the acid at different temperatures, I am going to see what will happen to the speed of reaction when I change the temperature, and then I will see how much Carbon dioxide is produced over a period of time. The equipment that I am going to use is the following: Beaker Tub full of water Measuring cylinder Pipe to connect the two Stop watch Bunsen burner Tri pod Thermometer Clamp 100cm3 hydrochloric acid Calcium carbonates (1g) During the experiment the equation I will be using is the following CaCO3 + 2HCL CaCL + H2O + CO2 If I use this formula each time then there should be a salt, the salt that is produced is Calcium Chloride. With this equipment I can plan my experiment, first I will measure out 100cm3 of hydrochloric acid and place it into a beaker, and I will then go and obtain 1g of calcium carbonate in which I will add to the beaker with the Hydrochloric acid. When I do this I will then start the stop watch, I will then record my results every half minutes for the next 4 minuets and record my results. ...read more.

Middle

I think that one of our results were wrong because the hydrochloric acid stops producing Carbon dioxide and normally it will not do that. Here is the result that was wrong and also the repeated results: Time 1g/0.5m 0 0 cm3 0.5 1 cm3 1 2 cm3 1.5 3 cm3 2 3 cm3 2.5 4 cm3 3 5 cm3 3.5 5 cm3 4 6 cm3 Repeated results: Time 1g/0.5m 0 0 cm3 0.5 1 cm3 1 2 cm3 1.5 4 cm3 2 5 cm3 2.5 6 cm3 3 7 cm3 3.5 8 cm3 4 9 cm3 These repeated results are better because there is a following pattern of how much Carbon dioxide is being produced, instead of the Carbon dioxide starting and stopping. My results are not that reliable because I did not have enough time to extend the amount of time given to make my results more accurate. If I had the time I would have gone for 10 or 15 minutes this would have given me a greater range of results to prove that when you heat the hydrochloric acid the reaction is faster and you will get greater results to draw from. There are many problems with the experiment, the first is the Calcium carbonate, you might have think you have got 1g of Calcium carbonate but the surface area might be bigger, with this ...read more.

Conclusion

the answer to this could have been that the surface area of the Calcium carbonate could have been smaller or bigger for the molecules to collide with the Calcium Carbonate. To make sure that my conclusion was right I could have done the experiment again and tested my theory of molecules colliding to make the reaction happen faster. Theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another. Not all collisions, however, bring about chemical change. A collision will be effective in producing chemical change only if the species brought together possess a certain minimum value of internal energy, equal to the activation energy of the reaction. Furthermore, the colliding species must be oriented in a manner favourable to the necessary rearrangement of atoms and electrons. Thus, according to the collision theory, the rate at which a chemical reaction proceeds is equal to the frequency of effective collisions. I could have also changed the amount of 2HCL that I used to prove that when you heat the Hydrochloric acid (2HCL) and use however much concentration you use that as soon as you heat it up you will always get better results in the end. ...read more.

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