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Unformatted text preview: Part II For part II we added calcium to water then titrated it by adding HCl. Ca + +H 2 O→Ca(OH) 2 +H 2 Ca(OH) 2 +2HCl→CaCl 2 +H 2 O. From the change in volume of the HCl we found the molarity of hydrogen and then the moles. The mole ratio of OH- to Ca (1.9:1) lead to the chemical formula. Ca(OH) 2 We learned how to find the molecular formula of Ca(OH) 2 by titrating. Possible sources of error in part II could be if we began the titration before all the calcium had reacted with the water. We would have then mixed HCl with Ca, forming hydrogen gas, and making our volume necessary to neutralize lower....
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- Spring '07
- Mole, Elizabeth Farrington Experiment