The phosphorus in a sample of phosphate rock weighing 0.5428 g is precipitated as MgNH₄PO₄•6H₂O
(Molar mass = 245.32 g/mol) and ignited to Mg₂P₂O₇ (Molar mass = 222.55 g/mol). If the ignited
precipitate is 0.2234 g, calculate
(a) %P₂O₅ (Molar mass = 141.95 g/mol) in the sample.
(b) the purity as P (Atomic mass = 30.97 g/mol) rather than P₂O₅.?
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Asked by Bohr Phywiz on 27th November, 2020
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