Sample 1 Sample 2 Unknown CaCl2 solution code (if any) 2 1. Unknown Code = 2. Volume of 0.100 M Na3PO4 solution used 30mL 30ML 3. Initial burette volume of CaCl2 solution 0.6 mL 20.6 4. Final burette volume of CaCl2 solution 20.6 mL 40.6 mL 5. Volume of unknown CaCl2 solution used 20 mL 20 mL Mass of filter paper D.381 g 6. 0.356 Mass of filter paper + Ca3(PO4)2 precipitate 0.453 g 0.383g 7. 8. Mass of Ca3(PO4)2 precipitate recovered 0.072 0.027 9. Moles of Ca3(P04)2 recovered 0.000232 mel 0.0000 87 l mol 10. Moles of CaCl2 consumed in reaction 0.000696 mol 0,000261 mol 11. Molarity of unknown CaCl2 solution 0.0348 M O.0131 12. Average Value for Molarity of Unknown CaCl2 solution 0.024 %3D

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