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Shelby McLenithan Honors Chemistry 12/1/10 STOICIOMETRY LAB head word= which compound hold back out stir the just about carbonic acid gas by heating of the followers: * calcium carbonate * Sodium bicarbonate * Copper (II) carbonate. supposal= Calcium carbonate will produce the roughly carbon dioxide by heating Stoichiometry: Variables: low-level= tot of carbon dioxide unconditional= the reactants control= amount of reaction, same amount of heating ( 5 minutes) Procedure: 1. Measure out 1 gram of CO2 2. Heat CaCO3 for 5 minutes using th etna burner 3. think mass of CaCO3 after 5 minutes 4. catch the difference in mass between CaCO3 and CO2 5. retrogress 1-4 for NaHCO3 6. Repeat 1-4 for CuCO3 Results: | 1st run| 2nd trial| third trial | CuCO3| 17.85| 17.8| 17.84| CO2 emission| .25g| .3g| .26g| NaHCO3| 17.35| 17.5| 17.65| CO2 emission| .6g| .75g| 4.5| CaCO3| 18.1| 18.05| No results| CO2 emission| 0| .5g| No results| Percent leaves: deepen| authentic| Theoretical| Percent| CaCO3| .25| .44| 57%| CuCO3| .27| .35| 77%| NaCO3| .6| .31| 198%| zConclusion: My possibility was non correct according to my results.

I had based my dead reckoning wrap up of the theoretical yield data we self-collected after doing a few stoichiometry equations. The actual riddles we performed proved that NaHCO3 produced the most CO2 by heating and CaCO3 produced the least. Percent yield is a measure of how oftentimes of a product you actually obtained in a reaction compared to the amount that you could have obtained according to calculations. Since o! ur portion yield for NaCO3 is so high, some parts of our experiment whitethorn have bygone wrong. An fault we could have made was expect all the test tubes calculateed the same, and next time we should properly weigh them. Another error we could have made could be not measuring the compounds right on or not safekeeping the heating time constant. I learned what percent yield was, and how to find theorectical yield...If you want to get a full essay, come out it on our website: BestEssayCheap.com

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