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The factors affecting the volume of Carbon Dioxide gas produced when a carbonate reacts with an acid

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Introduction

The factors affecting the volume of Carbon Dioxide gas produced when a carbonate reacts with an acid. Introduction In this investigation I will aim to investigate the factors affecting the volume of carbon dioxide gas produced when Calcium carbonate reacts with Hydrochloric acid. This is shown in the equation below. CaCo + HCL CaCl + Co + H O Calcium Carbonate + Hydrochloric acid Calcium Chloride + Carbon dioxide + water My results will be in cm�. I will workout my predicted results with the help of the moles equation We were given six different variables to experiment on. We had to choose one and investigate the different factors of it. The variables are listed below: 1. Concentration of acid 2. Volume of acid 3. Type of acid 4. Type of carbonate 5. Mass of carbonate 6. Temperature I have chosen to investigate the mass of the carbonate as I can obtain the results easily and all the equipment is easily available. For variables such as type of carbonate or acid I would have a limited number of acids and carbonates and so my results would be slightly restricted. Also for temperatures it is very inconsistent and the temperature can change every few seconds hence it would be particularly difficult to obtain exact results. Variables The variables that I will attempt to keep the same are: * Molar of acid. ...read more.

Middle

x 9 = 216cm� 1.0g 240cm� As we can see from the information above if you double the mass, the amount of gas given off also doubles. For example: 0.5g of Calcium Carbonate gives 120cm�of gas 1.0g of Calcium Carbonate gives 240cm�of gas Apparatus Below is a list of the equipment that I need to use for the experiment: * Beaker * Measuring Cylinder * Clamp and boss * Stand * Water bath * Calcium Carbonate - powder * Hydrochloric acid * Goggles * Lab coat * Electronic scales * Bung * Water * Flat bottomed flask * Delivery tube with attached bung * Ignition tube * Stopwatch * Spatula Diagram Method Below is a copy of my method. I have made it as clear as possible and tried to use the most effective ways in which to obtain the best results. 1. Collect all the apparatus mentioned on the page before. 2. Set up the equipment as shown above. 3. Weigh the amount of Calcium Carbonate powder needed on the scales 4. Put the carbonate in an ignition tube 5. Collect 100ml of Hydrochloric acid. 6. Pour the acid into the flat bottomed flask 7. Measure the amount of water in the test tube 8. Tilt the flat bottomed flask to an angle of about 45�. Then put the mini tube on the edge of the flat bottomed flask so that it is still at the neck of the flask. ...read more.

Conclusion

The other results are within twenty percent of what the results should have been. As I predicted, my graph is a straight line through the origin. I do not think that I will need to repeat my results another time as they are rather accurate. My results are not 100% accurate compared to my predictions due to some experimental errors. These could be the gas dissolving in water, not all the powder leaving the ignition tube or not collecting the exact amount of calcium carbonate powder as it is hard to get this exact mass. There was only one result that was slightly anomalous. This again could be from the results of the experimental errors mentioned above. Evaluation Using the method I have written I carried out the experiment and obtained some rather accurate results. Again I do not think I shall have to repeat my results as my prediction and results agree. There is only one slightly anomalous result which I could have done better on. But as a whole I think my results were accurate as many of them were in ten percent of what they should have been. If I could improve on anything I think I could have put the bung on the flask faster or even try and get a more accurate result for the powder and acid. I do think that I have collected enough evidence to support my conclusion. Due to my scale of results and extra results I do not think that I could do more to prove my prediction. ?? ?? ?? ?? ...read more.

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