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Sample Problem: . A 0.3516 g sample of commercial phosphate detergent was ignited at a red heat to destroy the organic matter. The residue was then taken up in hot HCI, which converted the P to H3PO4. The phosphate was precipitated as MgNH4PO4.6H₂O by addition of Mg2+ followed by aqueous NH3. After being filtered and washed, the precipitate was converted to Mg2P₂O7 (FW = 222.57) by ignition at 1000 C This residue weighed 0.2161g. calculate the percent P(FW= 30.974) in the sample.

Sample Problem: . A 0.3516 g sample of commercial phosphate detergent was ignited at a red heat to destroy the organic matter. The residue was then taken up in hot HCI, which converted the P to H3PO4. The phosphate was precipitated as MgNH4PO4.6H₂O by addition of Mg2+ followed by aqueous NH3. After being filtered and washed, the precipitate was converted to Mg2P₂O7 (FW = 222.57) by ignition at 1000 C This residue weighed 0.2161g. calculate the percent P(FW= 30.974) in the sample.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Sample Problem: . A 0.3516 g sample of commercial phosphate detergent was ignited at a red heat to destroy the organic matter. The residue was then taken up in hot HCI, which converted the P to H3PO4. The phosphate was precipitated as MgNH4PO4.6H₂O by addition of Mg2+ followed by aqueous NH3. After being filtered and washed, the precipitate was converted to Mg2P2O7 (FW = 222.57) by ignition at 1000°C This residue weighed 0.2161g. calculate the percent P(FW= 30.974) in the sample.
Transcribed Image Text:Sample Problem: . A 0.3516 g sample of commercial phosphate detergent was ignited at a red heat to destroy the organic matter. The residue was then taken up in hot HCI, which converted the P to H3PO4. The phosphate was precipitated as MgNH4PO4.6H₂O by addition of Mg2+ followed by aqueous NH3. After being filtered and washed, the precipitate was converted to Mg2P2O7 (FW = 222.57) by ignition at 1000°C This residue weighed 0.2161g. calculate the percent P(FW= 30.974) in the sample.
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