(a) Given the Ksp of calcium phosphate, Ca3(PO4)2 is 1.3 × 1032. Calculate concentrations of Ca2+ and PO43− respectively. (b) If a hard water contains 75 mg/L of Ca2+, at what concentration of PO43- would a precipitate of Ca3(PO4)2 begin to appear?

(a) Given the Ksp of calcium phosphate, Ca3(PO4)2 is 1.3 × 1032. Calculate concentrations of Ca2+ and PO43− respectively. (b) If a hard water contains 75 mg/L of Ca2+, at what concentration of PO43- would a precipitate of Ca3(PO4)2 begin to appear?

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 12.107PAE

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Question

(a) Given the Ksp of calcium phosphate, Ca3(PO4)2 is 1.3 × 10³². Calculate concentrations of Ca²⁺ and PO₄³⁻ respectively.

(b) If a hard water contains 75 mg/L of Ca²⁺, at what concentration of PO₄^3-would a precipitate of Ca₃(PO₄)₂begin to appear?

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