Question

calculate the mass percentage of calcium and phosphorus Calcium phosphate​

Answer 1

Molecular formula of calcium phosphate is Ca3(PO4)2

Its molar mass is 3(40)+2(31)+8(16)=310 g/mol.

Percent of calcium = 310/120×100=38.71%

Percent of phosphorus = 310/62×100=20.0%

Percent of oxygen = 310/128×100=41.29%

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Answer 2

Given:

Calcium Phosphate Ca3(PO4)2.

To Find:

The mass percentage of calcium and phosphorous.

Calculation:

- The molar mass of Calcium Phosphate, W = 310 gm

- The mass of Calcium in Calcium Phosphate, w1 = 40×3 = 120 gm

- The mass of Phosphorous in Calcium Phosphate, w2 = 31×2 = 62 gm

- The mass % of calcium = (w1/W)×100 = (120/310)×100

⇒The mass % of calcium = 38.71 %

- The mass % of phosphorous = (w2/W)×100 = (62/310)×100

⇒The mass % of phosphorous = 20 %

- So, the mass percentage of Calcium and Phosphorous in Calcium Phosphate is 38.71 % and 20% respectively.