Question

The unit in which the solubility product of barium phosphate is expressed as

• A. $mol^{2} \, dm ^{-6}$
• B. $mol^3\, dm^{-9}$
• C. $mol^4\, dm^{-12}$
• D. $mol^5\, dm^{-15}$

Answer 1

Answer: (D)

$mol^5\, dm^{-15}$

Answer 2

Barium phosphate when dissolved in water: $Ba_{3}\left(PO_{4}\right)_{2} \rightarrow 3Ba^{2+}+2PO_{4}^{3-}$ Let the solubility of Ba 3 (PO) be s mol dm $\Rightarrow$ Solubility product = (Ba) (PO) s = mol dm