- A 0.4586 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid. Tin was precipitated as Sn

[answerhappygod]

A 0 4586 G Sample Of Pewter Containing Tin Lead Copper And Zinc Was Dissolved In Acid Tin Was Precipitated As Sn 1 (134.35 KiB) Viewed 67 times

- A 0.4586 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid. Tin was precipitated as Sno, .4H,O 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 35.90 mL of 0.001520 M EDTA. Thiosulfate was used to mask the copper in a second 20.00 mL aliquot. Titration of the lead and zinc in this aliquot required 34.37 mL of the 0.001520 M EDTA solution. Finally, cyanide was used to mask the copper and the zinc in a third 25.00 mL aliquot. Titration of the lead in this aliquot required 27.38 mL of the 0.001520 M EDTA solution. Determine the percent composition by mass of each metal in the pewter sample. Cu: % Zn : % Sn: Pb: