Lab8 - Uyen Nguyen Solubility Product of Ca(OH)2 April 8,...

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Uyen Nguyen Solubility Product of Ca(OH) 2 April 8, 2008 Chem 002, Section 5
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Introduction This laboratory experiment is important because it introduces the concept of solubility equilibria. In this experiment, students are experimenting with the solubility for a slighting soluble salt, calcium hydroxide by titrating the hydroxide ions with acid. The goal of this lab is to determine where or not you can obtain the K sp simply by measuring the pH of the original saturated Ca(OH) 2 solution. Experimental Procedures: Materials: Distilled water 150 mL beaker Calcium hydroxide Funnel Filter paper Volumetric pipet 0.01 M HCl 125 mL Erlenmeyer flask 50 mL buret pH meter Procedure: 1. Add 75 mL of distilled water into a beaker and then begin adding small amounts of calcium hydroxide until a detectable amount of solid remains. 2. Use a volumetric pipet and transfer 25 mL of 0.01 M HCl into a 125 mL Erlenmeyer flask. 3. Set up a funnel with filter paper and begin filtering the calcium hydroxide at equilibrium into another empty 125 mL Erlenmeyer flask. 4. Once the solution is finish filtering, measure the pH of the calcium hydroxide at equilibrium. Also measure the pH of the HCl. 5.
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Lab8 - Uyen Nguyen Solubility Product of Ca(OH)2 April 8,...

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