Question

Part A and Part B.

Also question #3-post lab. (its circled)

A. Molar Solubility and Solubility Product of Calcium Hydroxide Trial I Trial 3 Trial 2 25.0 1. Volume of saturated Ca(OH), solution (mL) 2. Concentration of standardized HCl solution (molU/L) 3. Buret reading, initial (mL 4. Buret reading, final (mL) 5. Volume of HCI added (mL) 6. Moles of HCI added (mol) 7. Moles of OH" in saturated solution (mol) 8. (OH1, equilibrium (mol/L) 9. (Ca2 ], equilibrium (mol/L) 25.0 11 25313.1 25.30 48.3031.3 10. Molar solubility of Ca(OH)2 (moU/L) 11. Average molar solubility of Ca(OH), (mol/L) 12. Kio of Ca(OH) 13. Average Kp 14. Standard deviation of K, 15. Relative standard deviation of K, (%RSD) Appendix B Appendix B Calculations for Trial 1. Experiment 22 263 140 NMolar Solubility of Calcium Hydroxide in the Presence of a Common lon Trial I Trial 2 Trial 3 1. Volume of saturated Ca(OH) with added CaCl solution (mL) 2 Concentration of standardized HCI solution (mol/L) a Buret reading, inia l 25.0 25.0 25.0 Buret reading.final (mL) s. Volume of HCl added Cmb) 6. Moles of HCI added (mol) 7. Moles of OH in saturated solution (mol) &. IOH 1 equilibrium (mol/L) 9. Molar solubility of Ca(OH), with added CaCl (moVL) 10. Average molar solubility of Ca(OH) with added CaCl, (moVL) Account for the different molar solubilities in Part A.11 and Part B.10 (Report Sheet) ory Questions Circle the questions that are to be answered. Suppose some of the solid calcium hydroxide is inadvertently transferred along with the supernatant liq less, or the same amount of hydrochloric acid titrant be used for the analysis in Part A.6? Explain. 1. Part A.2. for analysis. a. Will more, l er increase, decrease, or have no effect on the calculated solubility product for calciunm hydroxide? Explain. e. Will this inadvertent transfer increase, decrease, or have no effect on the calculated molar solubility of calcium hydroxide? Explain. buret tip increase, decrease, or have no effect on the Kip value of the Ca(OH),? Explain. dark red-orange. As a result of this technique error, will the reported molar solubility of Ca(OH)-be too high or too 2. Part A.6. Does adding boiled, deionized water to the titrating flask to wash the wall of the Erlenmeyer flask and the 3) Part A.6. While titrating the saturated Ca(OH), solution, Isabella was distracted, and the endpoint was surpassed 4. Part B.1. How will using tap water instead of boiled, deionized water affect the K value of CalOH)-increase, 5. Part A.8.Jerry forgot to record the actual molar concentration of the standard HCI solution (which was actually 0044 M). %, The ethylenediaminetetraacetate ion, H2Y-, forms a strong complex with the calcium ion. How does the addition of 264 Molar Solubility, Common-lon Effect low? Explain. decrease, or have no effect? Explain. Hint: How will the minerals in the water affect the solubility of Ca(OH),1? However, to complete the calculations quickly, the-0.05 M concentration was used. Will the reported molar solubility of Ca(OH), be too high or too low? Explain. HY affect the molar solubility of Ca(OH)? Explain. See Experiment 21 for the reaction of Ca2' with H,Y

Answer 1

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