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Unformatted text preview: Part two of this experiment involved acid-base titration. The purpose was to determine the chemical formula of calcium hydroxide. We placed two different samples of calcium to attain more accurate results. Hydrochloric acid was placed in a burette and added to a solution of DI water, calcium, and thymol blue. We titrated the HCl into this solution until it turned yellow, indicating that it had changed from a base to an acid. The balanced equation for this reaction is: Ca(OH)2+ 2HCl > CaCl2 + 2H2O. There are multiple sources of error that could have affected the results of this experiment. If there was still some calcium metal left in the reaction with water, it would decrease the amount of Ca(OH)2, and more HCl would have to be added. The molarity of HCl could also be slightly off, and affect the number of moles of H+ we calculated....
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