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Q3/A 0.80868 gm sample of a commercial phosphate detergent was ignited at a red heat to destroy the organic matter the residue was then taken up in hot HCl, which converted the P to H3PO4. The phosphate was precipitated as MgNH4PO4.6H₂O by addition of Mg¹² followed by aqueous NH3. after being filtered and washed. The precipitate was converted to +2 Mg₂P₂0,(222.57gm mol) by ignition at 1000 Cº this residue weighed represent 61.5% of the total sample mass. Calculate the percent P(30.974gm mol),O (16 gm/mol) and Mg (24.3 gm/mol) in the sample.

Q3/A 0.80868 gm sample of a commercial phosphate detergent was ignited at a red heat to destroy the organic matter the residue was then taken up in hot HCl, which converted the P to H3PO4. The phosphate was precipitated as MgNH4PO4.6H₂O by addition of Mg¹² followed by aqueous NH3. after being filtered and washed. The precipitate was converted to +2 Mg₂P₂0,(222.57gm mol) by ignition at 1000 Cº this residue weighed represent 61.5% of the total sample mass. Calculate the percent P(30.974gm mol),O (16 gm/mol) and Mg (24.3 gm/mol) in the sample.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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. Q3/A 0.80868 gm sample of a commercial phosphate detergent was ignited at a red heat to destroy the organic matter the residue was then taken up in hot HCl, which converted the P to H3PO4. The phosphate was precipitated as MgNH4PO4.6H₂O by addition of Mg¹2 followed by aqueous NH3. after being filtered and washed. The precipitate was converted to +2 Mg₂P₂0,(222.57gm mol) by ignition at 1000 Cº this residue weighed represent 61.5% of the total sample mass. Calculate the percent P(30.974gm mol),O (16 gm/mol) and Mg (24.3 gm/mol) in the sample.
Transcribed Image Text:. Q3/A 0.80868 gm sample of a commercial phosphate detergent was ignited at a red heat to destroy the organic matter the residue was then taken up in hot HCl, which converted the P to H3PO4. The phosphate was precipitated as MgNH4PO4.6H₂O by addition of Mg¹2 followed by aqueous NH3. after being filtered and washed. The precipitate was converted to +2 Mg₂P₂0,(222.57gm mol) by ignition at 1000 Cº this residue weighed represent 61.5% of the total sample mass. Calculate the percent P(30.974gm mol),O (16 gm/mol) and Mg (24.3 gm/mol) in the sample.
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