Hydroxyapatite, Which Is a Component of Tooth Enamel, Is Very $\rightleftarrows$

question 74

Short Answer

Hydroxyapatite, which is a component of tooth enamel, is very insoluble in water. For the following reaction, K_sp = 2.3 *10^-59.
Ca₅ (PO₄)₃(OH)(s) $\rightleftarrows$ Ca₅ (PO₄)₃⁺(aq) + OH^-(aq)
What is the molar concentration of Ca₅(PO₄)₃⁺ when the pH of the mouth is 4.0?

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