Recall that Ksp is an equilibrium constant related to slightly soluble ionic compounds.
The dissociation of slightly soluble ionic compounds in solution is as follows:
MnNm(s) ⇌ n Mm+(aq) + m Nn–(aq)
The Ksp expression then is:
where x = molar solubility of the compound.
Solve Ksp for each:
Zn3(PO4)2; molar solubility = 1.5×10–7 M
MX(s) ⇌ M+(aq) +X–(aq)
The solubility of zinc(II) phosphate, Zn3(PO4)2, in pure water is 1.5×10–7 moles per liter. Calculate the value of Ksp for zinc(II) phosphate from this data.
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