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The Zn in a 260-g sample of foot powder was titrated with 2 L of 0.5 M EDTA. Calculate the percent Zn in this sample. (Zn = 65 g/mol)
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- 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?A 15.00 mL sample of hard water was titrated with a 0.0150 M EDTA solution. The titration required 26.72 mL of EDTA to reach the end point. What is the total hardness concentration of the water sample in ppm?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?
- A 0.72g sample of foot powder containing Zinc was titrated with 21.3mL of 0.02M EDTA. Calculate the % Zn in the sample.100.0 mL sample of drinking water was buffered with ammonia at pH 10 and after addition of EBT required 21.4 mL of 0.00512 M EDTA for titration. FW CaCO3 = 100.09 g/mol. What will be the change in color at the end point? What is the water hardness in terms of ppm CaCO3?. What is the role of ammonia buffer in the analysis?Chemistry written by hand. In titration of 50 ml 0.1 M Mn2+ with 0.01 M EDTA (pH = 7), what is pMn2+ when 100 ml EDTA is added? a.7 b.11 c.9 d.15 e.8
- 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, which of the following is the magnesium amount in the sample in ppm? (Mg:24 g/mol)Titration of 25.0 mL of a 0.0500 M Zn2+ solution with 0.0550 M EDTA in a solution buffered at pH 8. Assume that the temperature is 25 oC and that the formation constant for Zn2+ is 3.13 x 1016 at this temperature. What is the conditional formation constant for Zn at this pH?You are using EDTA with a concentration of 0.0080 M for the titration. You titrate 50.00 mL of water sample using 10.68 mL of EDTA. What is the concentration of Ca+2 ion? What is the water hardness? Show all calculations.
- 4.50 mL of 0.1 M Ca2+ ion was titrated at pH 10 with 0.1 M EDTA. What will be the concentration of Ca2+ ions in the solution when 25 mL, 50 mL and 75 mL EDTA is added(a4 = 0.35, Kf = 5.0x1010)?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).You are going to analyze a substance with the following structure. What method will be best used? CHOICES: a. Neutralization b. Direct EDTA Titration c. Indirect and Residual d. EDTA Titration e. Residual Titration Precipitation