(a) Given the Ksp of calcium phosphate, Ca3(PO4)2 is 1.3 ×10-32. Calculate the 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 ×10-32. Calculate the 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 ×10^-32. Calculate the concentrations of Ca²⁺ and PO₄^3-respectively.
(b) If a hard water contains 75 mg/L of Ca²⁺, at what concentration of PO₄
³⁻ would a precipitate of Ca₃(PO₄)₂ begin to appear?

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