Calculate the pCa for the titration of 50 ml of 0.02 M Ca2* at pH = 8 with 0.4 M EDTA after addition of 40 ml EDTA? Ca2+ + Y4- 2 CaY2- Kf = 5x1010
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- The amount of calcium in physiologic fluids can be determined by a complexometric titration with EDTA. In one such analysis, a 0.100-mL sample of blood serum was made basic by adding 2 drops of NaOH and titrated with 0.00528 M EDTA, requiring 0.233 mL to reach the end point. Report the concentration of calcium in the sample as miligrams of Ca per 100 mL. (Ca = 40.078 amu).Titration of Ca 2+ and Mg 2+ in a 50.00 ml sample required 25.50 mL Of 0.01115 M EDTA. A second 50 ml aliquot was made strongly basic with NaOH to precipitate the Mg 2+ as Mg(OH) 2(s). The supernatant liquid was titrated with 16.19 mL of the EDTA solution. Calculate the concetration in ppm of CaCO 3 in the sample О а. 100 O b.568.65 О с. 361.04 O d. 207.61Titration of Ca²+ and Mg²+ in a 50.00-mL hard water sample required 23.65 mL of 0.01205 M EDTA. A second 50.00-mL aliquot was made strongly basic with NaOH to precipitate Mg²+ as Mg(OH)2(s). The supernatant liquid was titrated with 14.53 mL of the EDTA solution. Calculate the total hardness of the water sample, expressed as ppm CaCO3.
- A sample containing 0.200 g primary standard calcium carbonate (CaCO3, FW-100.09 g/mol) was dissolved in HCI and diluted to 50 mL solution. After addition of ammonia buffer and Eriochrome Black T, the prepared solution was titrated using EDTA which required 16.0 mL. Calculate the molarity of the EDTA solution. * Identify the general type of titrimetric method used. * Identify the indicator in the titration * Identify the endpoint color41-42 Titration of Ca²⁺ and Mg²⁺ in a 50.0 mL sample of hard water required 32.45 mL of 0.01162 M EDTA. A second 50.0-mL aliquot was made strongly basic with NaOH to precipitate Mg²⁺ as Mg(OH)₂. The supernatant liquid was titrated with 15.35 mL of the EDTA solution.QUESTION.a) The concentration of CaCO₃ (100.09 g/mol) in the sample in mg/L. b) The concentration of MgCO₃ (84.31 g/mol) in the sample in mg/L.50 mL of a sample known to contain Mg+2 was taken and titrated with 0.075 M EDTA standard solution by adding pH 10 buffer and EBT indicator. Since the EDTA consumption is 10.5 mL, what is the amount of magnesium in the sample in ppm?
- 25.00 mL aliquots of the solution in problem 1 are titrated with EDTA to the calmagite end point. A blank containing a small measured amount of Mg^2+ requires 2.12 mL of the EDTA to reach the end point. An aliquot to which the same amount of Mg^2+ is added requires 25.88 mL of the EDTA to reach the end point.The titration curve for the titration of a mixture of KI and KCl with AgNO3 is shown. Identify each end point on the titration curve. The Ksp of AgI is 8.3 x 10-17 and the Ksp of AgCl is 1.8 × 10-¹0 mV Answer Bank [Ag+] [Ag+] = O Ag] = √Ksp (AgCl) iodide endpoint chloride endpoint VAg (mL) At the second equivalence point, which equation is used to calculate [Ag¹]? Ksp (AgCl) [CI] Ksp (AgI)Calcium is determined in serum by microtitration with EDTA. A 100-μL sample is treated with two drops of 2 M KOH, Cal-Red indicator is added, and the titration is performed with 0.00122 M EDTA, using a microburet. If 0.203 mL EDTA is required for titration, what is the level of calcium in the serum in mg/dL?
- Titration of Ca2+ and Mg2+ in a 50.00-mL sample of hard water required 23.65 mL of 0.01205 M EDTA. A second 50.00-mL aliquot was made strongly basic with NaOH to precipitate Mg2+ as Mg(OH)2(s). The supernatant liquid was titrated with 14.53 mL of the EDTA. Calculate the concentration in ppm of CaCO3 in the sample. Calculate the concentration in ppm of MgCO3 in the sample.Which of the following EDTA titration formats can be used when the analyte reacts too slowly with EDTA? Direct titration Back titration Displacement titration Indirect titration 1 only 2 only 2 & 3 3 only 4 onlyGiven that the titration of Ca2+ and Mg2+ in a 50.00-mL sample of hard water required 22.35 mL of 0.01115 M EDTA. A second 50.00-mL aliquot was made strongly basic with NaOH to precipitate the Mg2+ as Mg(OH)2(s) . The supernatant liquid was titrated with 15.19 mL of the EDTA solution. Calculate the concentration in ppm of CaCO3 in the sample.