Tag Archives: solubility

Gravimetric Method for Analysis of Phosphorous: Analysis of Procedure

Once upon a time, a common method for determining phosphorous was to convert it to phosphate, precipitate it as magnesium ammonium phosphate, MgNH4PO4, and ignite it to form magnesium pyrophosphate, Mg2P2O7.  The solubility reaction for MgNH4PO4 is MgNH4PO4(s) ↔ Mg2+(aq) … Continue reading

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Solubility of Milk of Magnesia

Milk of Magnesia, or MOM, is a suspension of Mg(OH)2.  One method for determining the amount of Mg(OH)2 in MOM is to precipitate the Mg2+ as MgNH4PO4.  Because this precipitate includes a weak acid, NH4+, and a weak base, PO43-, … Continue reading

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