A 1.22 g sample of impure lead nitrate was dissolved in 40.0 mL of distilled water and analyzed by gravimetric analysis to determine the percentage of lead by mass present. Sodium sulfate was delivered from a burette to precipitate the lead ions as lead sulfate. Sodium sulfate was added until no more precipitate was seen to form. At this point several drops of sodium sulfate were allowed to drop from the burette into the sample. The precipitate was filtered, washed and dried before been weighed. When weighed, the precipitate had a mass of 1.05 g. Calculate the mass of lead present in the precipitate. Atomic mass of Pb is 207.2 g/mol, FW of Lead sulfate =303.26 g/mol and FW of Lead nitrate = 331.2 g/mol.
A 1.22 g sample of impure lead nitrate was dissolved in 40.0 mL of distilled water and analyzed by gravimetric analysis to determine the percentage of lead by mass present. Sodium sulfate was delivered from a burette to precipitate the lead ions as lead sulfate. Sodium sulfate was added until no more precipitate was seen to form. At this point several drops of sodium sulfate were allowed to drop from the burette into the sample. The precipitate was filtered, washed and dried before been weighed. When weighed, the precipitate had a mass of 1.05 g. Calculate the mass of lead present in the precipitate. Atomic mass of Pb is 207.2 g/mol, FW of Lead sulfate =303.26 g/mol and FW of Lead nitrate = 331.2 g/mol.
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter4: Reactions In Aqueous Solution
Section: Chapter Questions
Problem 77QAP: A 300.0-g sample of a solid is made up of a uniform mixture of NaNO3, MgCl2, and BaCl2. A 100.0-g...
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A 1.22 g sample of impure lead nitrate was dissolved in 40.0 mL of distilled water and analyzed by gravimetric analysis to determine the percentage of lead by mass present. Sodium sulfate was delivered from a burette to precipitate the lead ions as lead sulfate. Sodium sulfate was added until no more precipitate was seen to form. At this point several drops of sodium sulfate were allowed to drop from the burette into the sample. The precipitate was filtered, washed and dried before been weighed. When weighed, the precipitate had a mass of 1.05 g.
Calculate the mass of lead present in the precipitate.
Atomic mass of Pb is 207.2 g/mol, FW of Lead sulfate =303.26 g/mol and FW of Lead nitrate = 331.2 g/mol.
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