A 0.141g sample of phosphorus containing compound was digested in a mixture ofHNO_(3) and H_(2)SO_(4) which resulant in formnation of CO_(2), H_(2)O and H_(3)PO_(4). Addition of ammounium molybdate yielded a solid having the composition (NH_(4))_(3) PO_(4).12MoO_(3). The precipitate was filtered, washed and dissolved in 50.0mL of 0.20M NaOH. (NH_(4))_(3) PIO_(4).12MoO_(3(s)) + 26OH^(-) rarr HPO_(4)^(2-) + 12MoO_(4)^(2-) + 14H_(2)O + 3NH_(3(g)) After boilingthe solution to remove the NH_(3), the excess of NaOH was titrated with 14.1 mL of 0.174M, HCl. Calculate the percentage of phosprous in the sample.

A 0.141g sample of phosphorus containing compound was digested in a mi

1.	A 0.141g sample of phosphorus containing compound was digested in a mixture ofHNO_(3) and H_(2)SO_(4) which resulant in formnation of CO_(2), H_(2)O and H_(3)PO_(4). Addition of ammounium molybdate yielded a solid having the composition (NH_(4))_(3) PO_(4).12MoO_(3). The precipitate was filtered, washed and dissolved in 50.0mL of 0.20M NaOH. (NH_(4))_(3) PIO_(4).12MoO_(3(s)) + 26OH^(-) rarr HPO_(4)^(2-) + 12MoO_(4)^(2-) + 14H_(2)O + 3NH_(3(g)) After boilingthe solution to remove the NH_(3), the excess of NaOH was titrated with 14.1 mL of 0.174M, HCl. Calculate the percentage of phosprous in the sample.
Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :`6.4%`</body></html>