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Solubility Product

What is the s...

Question

What is the solubility of $P b S O_{4}$ in 0.01 M $N a_{2} S O_{4}$ solution if $K_{s p}$ for $P b S O_{4} = 1.25 \times 10^{- 9}$ ?

1.25 \times 10^{- 7} m o l L^{- 1}

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1.25 \times 10^{- 9} m o l L^{- 1}

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1.25 \times 10^{- 10} m o l L^{- 1}

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0.10 m o l L^{- 1}

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Solution

The correct option is A $1.25 \times 10^{- 7} m o l L^{- 1}$
$N a_{2} S O_{4} \to 2 N a^{+} + S O_{4}^{- 2}$
$0.01$ $0.02$ $0.01$
$K_{s p}$ of $P b S O_{4} = 1.25 \times 10^{- 9}$
So solubility of $P b S O_{4} = \frac{1.25 \times 10^{- 9}}{0.01} = 1.25 \times 10^{- 7}$

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