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Chemical Economics Investigation: - speeding up the reaction speed between calcuim carbonate and hydrochloric acid.

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Introduction

Chemical Economics Investigation: - speeding up the reaction speed between calcuim carbonate and hydrochloric acid Aim The aim of this investigation is to see how quickly calcuim carbonate and hydrochloric acid react together to form calcium chloride, water and carbon dioxide. I was measuring the amount of carbon dioxide produced with a gas syringe. I had two choices of ways to speed up the reaction * Heat up the hydrochloric acid before adding the calcuim carbonate crystals to it. * Or increase the amount of hydrochloric acid (concentration) each time before adding the calcuim carbonate crystals to it. I chose to heat up the hydrochloric acid. Prediction I predict that by heating up the hydrochloric acid the speed of the reaction will increase. This because when you heat up the solution the particles become more active and start to move/ vibrate faster, by the particles being in this fast motion their will be more collisions between the calcuim carbonate and the hydrochloric acid particles speeding up the rate of the reaction. ...read more.

Middle

Put the hydrochloric acid into the conical flask and then place it on the gauze and turn on the Bunsen burner and heat it up to the temperature you want to start at. 3) Place the crystals into the conical flask when you have heated the hydrochloric acid to the temp you want. Attach the gas syringe to the conical flask and then read off the amount of gas produced every 10seconds for a minute. 4) Repeat the above for a range of different temperatures and do repeats for each temp so you can get a good average. 5) Wear an apron and goggles at all times as substances can be harmful, remember to write all results into a table. Results table Volume of gas (cm3) after every 10 seconds Temperature (*c) 0 10 20 30 40 50 60 Room temp (24) 0 15 25 30 33 36 40 30 0 20 28 35 40 44 46 40 0 24 34 40 45 49 53 50 0 23 42 47 50 53 56 60 0 46 65 84 100 Conclusion By ...read more.

Conclusion

start to move/ vibrate faster, by the particles being in this fast motion their will be more collisions between the calcium carbonate and the hydrochloric acid particles speeding up the rate of the reaction. Evaluation I think the experiment that I have just completed was quit fair but not fair enough to be exact because there may have been some hydrochloric lost because I might not have got it all out of the measuring cylinder and I did not have enough time to do repeats and get averages so that was a main limitation for me. I think all my measurements that I made were accurate and I kept all of my key variables under control. I did get some odd results that did not fit my line of best fit, that was because I did do repeats to get an average which would have mad my results more accurate. I could have improved the experiment that I did by having more time to do it in so I could get repeats because I fell I was very rushed for time. ...read more.

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