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why is it difficult to find the Ksp value for Mg(OH)2 during titration, compared to Ca(OH)
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- A saturated AgCl solution was analyzed and found to contain 1.25 x 10-5 M Ag+ ions. Use this value to calculate the Ksp of AgClDevelop a titer for determining water hardness based on the following information: 6.240 mg/L Ca2+ calcium standard. It is titrated to the endpoint with 8.59, 8.34, and 8.47 mL of EDTA solution.Which of the following would lead to a negative percentage error in the determination of Ksp of Ca(OH)2? a. Unsaturated Ca(OH)2 solution was used in the titration. b. The volume of saturated CaCl2 used in the titration was in excess. c. The volume of HCl used was beyond the equivalence point of the reaction. d. A more concentrated HCl solution was used in the titration of Ca(OH)2.
- DETERMINATION OF WATER HARDNESS BY EDTA TITRATION 1. Why is it needed to add a pH 10 buffer to the sample during EDTA titration? 2. What is EDTA and why can it be used to determine the hardness of water?Phenolphthalein starts to turn pink at a pH just over 8. Why is it used to monitor the titration of a weak acid with a strong base?You titrate 50.00 mL of hard water with 14.86 mL of 0.0100 M EDTA solution. How many moles of Ca²+ are present in the sample? What is the hardness in units of mg CaCO, per Liter of solution?
- What is a 3 point calibration in titration?The Ksp of AgCl is 1.61 x 10-10. What is the solubility of AgCl in a solution of 4.69 x 10-4 M SrCl2?A 28.7 mL aliquot of hypochlorous acid that has a concentration of 0.516 M will be titrated with 0.345 M NaOH. Calculate the pH of the solution upon the addition of 8.14 mL of NaOH. The Ka of the acid at the temperature of the experiment is 3.34 x 10-8.
- On mixing 10.0 mL of 0.10 F CaCl₂ with 10.0 mL of 0.10 F Na₂SO4, what % of the CaSO4 formed dissolves? CaSO4: Ksp = 2.4 x 10-5At some other temperature, a solid sample of Ca(OH)2 is shaken with 0.0100 M CaCl2.Once equilibrated, some solid Ca(OH)2 remains undissolved.The solution is filtered and a 20.00 mL sample requires 39.04 mL of 0.0100 M HCl to neutralize it.Calculate the value for Ksp of Ca(OH)2 from this data.The Kjedahl procedure was used to analyze 256 µL of a solution containing 37.0 mg protein/mL. The liberated NH3 was collected in 5.00 mL of 0.033 6 M HCl, and the remaining acid required 6.34 mL of 0.010 M NaOH for complete titration. What is the weight percent of nitrogen in the protein? wt%