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11 of 15 ) A 5.39 g sample of a solid containing Ni is dissolved in...
A 6.04 g sample of a solid containing Ni is dissolved in 20.0 mL water. A...
A 6.04 g sample of a solid containing Ni is dissolved in 20.0 mL water. A 5.00 mL aliquot of this solution is diluted to 100.0 mL and analyzed in the lab. The analyzed solution was determined to contain 6.88 ppm Ni . Determine the molar concentration of Ni in the 20.0 mL solution. *concentration= ? M Determine the mass, in grams, of Ni in the original sample. *mass= ? g Determine the weight percent of Ni in the sample....
A 0.6004 g sample of Ni/Cu condenser tubing was dissolved in acid and diluted to 100.0...
A 0.6004 g sample of Ni/Cu condenser tubing was dissolved in acid and diluted to 100.0 mL via a volumetric flask. Titration of both cations in a 25.00 mL aliquot of this solution required 45.81 mL of 0.05285 M EDTA. Mercaptoacetic acid and NH3 were then introduced; production of the Cu complex with the former resulted in the release of an equivalent amount of EDTA, which required a 22.85 mL titration with 0.07238 M Mg2+. Calculate the percentages of Cu...
A 0.4598 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid....
A 0.4598 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid. Tin was precipitated as SnO2·4H2O and removed by filtration. The resulting filtrate and washings were diluted to a total volume of 250.0 mL. A 20.00 mL aliquot of this solution was buffered, and titration of the lead, copper, and zinc in solution required 34.81 mL of 0.001487 M EDTA. Thiosulfate was used to mask the copper in a second 25.00 mL aliquot. Titration of...
A 0.4505 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid....
A 0.4505 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid. Tin was precipitated as SnO2⋅4H2Oand removed by filtration. The resulting filtrate and washings were diluted to a total volume of 250.0 mL. A 15.00 mL aliquot of this solution was buffered, and titration of the lead, copper, and zinc in solution required 35.10 mL of 0.001497 M EDTA. Thiosulfate was used to mask the copper in a second 20.00 mL aliquot. Titration of the...
A 0.4504 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid....
A 0.4504 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid. Tin was precipitated as SnO2⋅4H2O and removed by filtration. The resulting filtrate and washings were diluted to a total volume of 250.0 mL. A 15.00 mL aliquot of this solution was buffered, and titration of the lead, copper, and zinc in solution required 35.78 mL of 0.001478 M EDTA. Thiosulfate was used to mask the copper in a second 20.00 mL aliquot. Titration of...
A 5.0067 g sample of Na2CrO4 (MW = 161.97 g/mol) is dissolved in 250.0 mL of...
A 5.0067 g sample of Na2CrO4 (MW = 161.97 g/mol) is dissolved in 250.0 mL of water. Assume the solution has a density of 1.00 g/mL. A 50.0 mL aliquot of the solution is then diluted to a final volume of 250.0 mL. What is the concentration of Na+ in the diluted solution in units of parts per million (ppm)?
A 5.9957 g sample of Na, CrO, (MW = 161.97 g/mol) is dissolved in 1000.0 mL...
A 5.9957 g sample of Na, CrO, (MW = 161.97 g/mol) is dissolved in 1000.0 mL of water. Assume the solution has a density of 1.00 g/mL What is the concentration of Na* (MW = 22.9898 g/mol) in the solution in units of molarity (M)? concentration: М What is the concentration of Na+ in the solution in units of parts per thousand (ppt)? concentration: ppt A 50.0 mL aliquot of the solution is then diluted to a final volume of...
A 11.17 mg ore sample containing copper is digested with acid, filtered and transferred to a...
A 11.17 mg ore sample containing copper is digested with acid, filtered and transferred to a volumetric flask and diluted to exactly 200.00 mL. A 10.00 mL aliquot is transferred to a 100.00 mL volumetric flask containing zincon reagent and a quantity of a pH 9 buffer solution. It is then diluted to the mark and mixed thoroughly. The measured absorbance of the resulting blue solution at 600 nm was 0.326 which corresponded to a Cu(II) concentration of 0.498 ppm...
A 0.3304-g sample of brass (containing lead, zinc, copper, and tin) was dissolved in nitric acid....
A 0.3304-g sample of brass (containing lead, zinc, copper, and tin) was dissolved in nitric acid. The sparingly soluble SnO2.4H2O was removed by filtration, and the combined filtrate and washings were then diluted to 500.0 mL. A 10.00-mL aliquot was suitably buffered; titration of the lead, zinc, and copper in this aliquot required 34.78 mL of 0.002700 M EDTA. The copper in a 25.00-mL aliquot was masked with thiosulfate; the lead and zinc were then titrated with 25.62 mL of...
Spectrochemical Analysis Methods
Given the molar absorptivity data for cobalt complex with 2,3-quinoxalinedithiol (QT) and QDT at 510 nm are:eCo = 36400 and egoT = 250 (at 510 nm)A 0.515 g sample was dissolved and diluted to 50.0 mL. A 20.0 mL aliquot was treated and QDT was added (with an excess QDT of 1x 10-4 M). The final volume was then adjusted to 50.0 mL. Thissolution has an absorbance of 0.371 at 510 nm in a 1.0 cm cell.Determine (a) the molar...
A 5.9957 g sample of Na, CrO, (MW = 161.97 g/mol) is dissolved in 1000.0 mL of water. Assume the solution has a density of 1.00 g/mL What is the concentration of Na* (MW = 22.9898 g/mol) in the solution in units of molarity (M)? concentration: М What is the concentration of Na+ in the solution in units of parts per thousand (ppt)? concentration: ppt A 50.0 mL aliquot of the solution is then diluted to a final volume of...
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