What is the chemical formula of calcium phosphate?

C a (P O_{4})_{2}

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C a_{3} (P O_{4})_{2}

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C a_{3} (P O_{4})

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C a_{2} (P O_{4})_{3}

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Solution

The correct option is B $C a_{3} (P O_{4})_{2}$
The chemical formula of calcium phosphate is $C a_{3} (P O_{4})_{2}$ .
Calcium ion has $+ 2$ charge ( $C a^{2 +}$ ) and phosphate ion has $- 3$ charge ( $P O_{4}^{3 -}$ ). Electrical neutrality will be maintained when three $C a^{2 +}$ ions will combine with two $P O_{4}^{3 -}$ ions.
$[3 \times (+ 2)] + [2 \times (- 3)] = 6 - 6 = 0$
Hence, correct option is $B$

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C a_{3} {(P O_{4})}_{2}

Calculate the mass per cent of calcium, phosphorus and oxygen in calcium phosphate $C a_{3} (P O_{4})_{2}$ .

C a_{3} {(P O_{4})}_{2}

C a_{3} (P O_{4})_{2}

H C l

C a_{3} (P O_{4})_{2} + 6 H C l \to 3 C a C l_{2} + 2 H_{3} P O_{4}

C a C l_{2}

\frac{1}{x}

x

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