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The phosphorus in a sample of phosphate rock weighing 0.5428 g is precipitated as MgNH₄PO₄•6H₂O...

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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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709