First slide

Solubility product(KSP)

Question

$pH of a saturated solution of Ca (OH)_{2} is 9 . The solubility product (K_{sp}) of Ca (OH)_{2} is$

Moderate

A

$0.5 \times 10^{- 10}$
B

$0.5 \times 10^{- 15}$
C

$0.25 \times 10^{- 10}$
D

$0.125 \times 10^{- 15}$

Solution

$pH of the saturated solution of Ca (OH)_{2} = 9 ∴ pOH of the saturated solution of Ca (OH)_{2} = 5 \Rightarrow [{OH}^{-}] = 10^{- 5} (∵ pH + pOH = 14)$

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