Question

Number of moles of calcium ions and phosphate ions present in half mole of calcium phosphate are respectively.

• A. 3, 2
• B. 2, 3
• C. 1.5, 1
• D. 1, 1.5

Answer 1

The correct option is C 1.5, 1

No. of moles of $C{a}^{2+}$ ions present in 1mole of $C{a}_3(P{O}_4{)}_2$ = 3
No. of moles of $C{a}^{2+}$ ions present in 1/2 mole of $C{a}_3(P{O}_4{)}_2$ = $3\times \frac{1}{2}$ = 1.5
No. of moles of $P{O}_4^{3-}$ ions present in 1 mole of $C{a}_3(P{O}_4{)}_2$ = 2
No. of moles of $P{O}_4^{3-}$ ions present in 1/2 mole of $C{a}_3(P{O}_4{)}_2$ = 1