Question

Calculate the percentage of phosphorus in :
(a) Calcium hydrogen phosphate Ca3(H2PO4)2
(b) Calcium phosphate Ca3(PO4)2​

Answer 1

Answer:

a)25.64%

b)19.972%

Explanation:

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Answer 2

Answer:

a. Molar mass of Ca3(H2PO4)2 is 2346/mole.

Atomic mass of phosphorus is 31g

so,% of phosphorus = (31×2/234)×100

= 26.49%.

b. Molar mass of calcium phosphate is 310.17 g/mole

Atomic mass of phosphorus = 31 g

so, % of phosphorus = (31×2/310.17)×100

= 19.98%.

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