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Reaction between calcium carbonate and hydrochloric acid

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Introduction

the reaction between calcium carbonate and hydrochloric acid AIM- My task is to investigate the reaction between calcium carbonate and hydrochloric acid, which produces calcium chloride, carbon dioxide, and water. To do this I will conduct an experiment. Word Equation: Calcium + Hydrochloric Calcium + Carbon Dioxide + Water Carbonate Acid Chloride Chemical Equation: CaCo3 (s) + 2Hcl (aq) CaCl2 + Co2 (g) + H20 (l) The key variables in this experiment that affect the rate of reaction is, surface area, temperature, mass of CaCo3 and concentration of acid. The surface area can be investigated by increasing or decreasing the surface area of the calcium carbonate (marble) chips (i.e. have them as chips or powdered). The temperature can be investigated by increasing the temperature of water in the water trough. Increasing or decreasing the mass of the calcium carbonate chips used in the experiment can investigate the mass. The concentration can be investigated by increasing or decreasing the concentration of acid put on the marble chips. The variable I will be changing in order to conduct my experiment is the concentration of acid as this will have an effect on how much Carbon Dioxide is produced. There are a number of ways in which this experiment can be conducted. Firstly, the volume of Carbon Dioxide produced can be measured at regular intervals- using a gas syringe or a measuring cylinder.

Middle

I will make sure this experiment is fair, by always using the same amount/mass of marble chips, making sure the same volume of water is used every time in the water trough, and making sure the water in the water trough is at a constant temperature. I will also make sure the same volume of acid is used. The only factor, I will be changing is the concentration of hydrochloric acid. I will make sure this experiment is safe, by always wearing goggles as acid is being used and there will be a chemical reaction. Also I will make sure, that if any acid is spilled, it should be cleared away quickly. If it gets on my hands or clothes, I will wash them thoroughly to avoid burning myself. If it spills on the desk, I will inform the teacher and clean it without getting it on my hands or clothes. The measuring cylinder I will use to measure the volume of Co2 produced will be 100ml because I will be able to measure quite accurately. The mass of the calcium carbonate chips I will be using is 10g. The volume of acid I will use is 30ml. This is the table I propose to record my results in: Volume of Acid Concentration Of Acid Time/ Minutes Mass of Marble chips Volume of Co2 produced Temp of H20 HYPOTHESIS- I think that as the concentration of acid increases the volume of Co2 produced will also increase.

Conclusion

1.5 Molar 1 210 ml 150 ml 200 ml 187 ml 1.5 Molar 2 295 ml 200ml 280 ml 258 ml 1.5 Molar 3 330 ml 210 ml 305 ml 282 ml 1.5 Molar 4 342 ml 215 ml 312 ml 290 ml 1.5 Molar 5 350 ml 216 ml 315 ml 294 ml 1.5 Molar 6 351 ml 217 ml 317 ml 295 ml 1.5 Molar 7 352 ml 217 ml 317 ml 295 ml 1.5 Molar 8 352 ml 217 ml 317 ml 295 ml 1.5 Molar 9 352 ml 217 ml 317 ml 295 ml 1.5 Molar 10 352 ml 217 ml 317 ml 295 ml Concentration Of acid Time/ Minutes First Results Second Results Third Results Average (3sf) 2 Molar 1 300 ml 335 ml 300 ml 312 ml 2 Molar 2 335 ml 365 ml 325 ml 342 ml 2 Molar 3 395 ml 400 ml 375 ml 390 ml 2 Molar 4 415 ml 419 ml 395 ml 410 ml 2 Molar 5 426 ml 429 ml 400 ml 418 ml 2 Molar 6 432 ml 435 ml 405 ml 424 ml 2 Molar 7 434 ml 439 ml 406 ml 426 ml 2 Molar 8 435 ml 439 ml 406 ml 427 ml 2 Molar 9 436 ml 439 ml 406 ml 427 ml 2 Molar 10 436 ml 439 ml 406 ml 427 ml

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