If the concentration of phosphate ions ([PO43-1) in a saturated solution of Ca3(PO4)2 is known, which...

Question

Question

science chemistry

Answer 1

Answer #1

Answer

K_sp = 27[PO₄^3-]⁵/8

Explanation

Solubility equilibrium of Ca₃(PO₄)₂ is

Ca₃(PO₄)₂(s) <---------> 3Ca²⁺(aq) + 2PO₄^2-(aq)

K_sp = [Ca²⁺]³ [ PO₄^3-]²

[Ca²⁺] = (3/2) [PO₄^3-]

K_sp = ((3/2)[PO₄^3-])³[PO₄^3-]²

K_sp = 27[PO₄^3-]⁵/8

Answer 2

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