Calculate the mass percent of calcium, phosphorus and oxygen in calcium Phosphate; Ca_{3} (PO_{4}­­)_{2}

 

Answers (1)

Molecular mass of Ca_{3} (PO_{4}­­)_{2}

=\left ( 3\times 40 \right )+\left [ 2\left ( 31+16\times 4 \right ) \right ]=310

Mass percent of Calcium =\frac{3x \; Atomic \; mass \; of \; calcium}{Total\; molecular \; mass\; of \; calcium \; Phosphate}\times 100

=\frac{3\times 40}{310}\times 100= 38.71\; ^{o}/_{o}

Likewise,

Mass percent of phosphorus = \frac{2x \; Atomic \; mass \; of \; Phosphorous}{Total\; molecular \; mass\; of \; calcium\; Phosphate}\times 100

=\frac{2\times 31}{310}\times 100= 20\; ^{o}/_{o}

Mass percent of Oxygen=\frac{2x \; Atomic \; mass \; of \; Oxygen}{Total\; molecular \; mass\; of \; calcium\; Phosphate}\times 100

=\frac{2\times 64}{310}\times 100= 41.29\; ^{o}/_{o}

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