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?
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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?
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- In a hardness of water determination like the one performed in this experiment, it was found that a 25.00-mL sample of water required 12.25mL of 0.0128 M EDTA solution for complete titration. What is the concentration (molarity) of Ca2+ ions in the water sample? What is concentration of CaCO3 (in mg/L) in the water sample? Describe the hardness level of the water using the U.S. government standards.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?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 value of magnesium in ppm in the sample?(Mg:24 g/mol)
- If you titrate 50 mL of a sample with 0.06 N EDTA and the titration takes 12.4 mL of EDTA to reach the endpoint, what is the hardness of the sample in ppm as CaCO3?Identify the nature of the water sample from the hardness value.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 amount of magnesium in the sample in ppm? (Mg:24 g/mol) A. 378 B. 302 C. 214 D. 251Chemistry 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
- 1) 100 mL tap water is titrated with 20 mL of 0.02 M EDTA solution to determine the hardness of the water. The second 100 mL tap water is precipitated as CaC2O4 and removed by filtration and the filtrate is titrated with 8.0 mL of the same EDTA solution. What are the concentrations (as ppm) of Ca2+ (40.078 g/mol) and Mg2+ (24.305 g/mol) ions in the water? 2) 10 g of a solution, containing one or more of NaOH, Na3PO4, Na2HPO4, NaH2PO4, H3PO4 and HCl substances, is titrated with 1.0 M NaOH using the phenolphthalein indicator and 34.5 mL NaOH is used. Another 10 g mixture was titrated to reach the bromocresol green end point and 20.50 mL NaOH is used. What is the composition of the solution? What are the percentages of the species(H:1.0078, O:15.99, Na: 22.98, P:30.974, Cl:35.453)?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?If 25,0 cm3 of the NH3 (concentration 0,10 mol∙dm–3) is titrated with the HCl (concentration 0,10 mol∙dm–3), calculate the pH at the equivalence point of the titration
- 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 pZn of the solution after 30 mL of titrant have been added?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 10-8.50 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)