What is the solubility of PbSO4 in 0.01 M Na2SO4 solution if Ksp for PbSO4 is 1.25 × 10-9 ?

Question

What is the solubility of PbSO4 in 0.01 M Na2SO4 solution if Ksp for PbSO4 is 1.25 × 10-9 ? (A) 1.25 × 10-7 mol L-1 (B) 1.25 × 10-9 mol L-1 (C) 1.25 × 10-10 mol L-1 (D) 0.10 mol L-1

Tardigrade Admin · Accepted Answer

[SO42-]=0.01 mol L-1 Ksp=[pb2+][SO42-] or [pb2+]=Ksp [SO42-] =(1.25×10-9/0.01)

Q. 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 $P b S O_{4}$ is $1.25 \times 1 0^{- 9}$ ?

$1.25 \times 1 0^{- 7} m o l L^{- 1}$

$1.25 \times 1 0^{- 9} m o l L^{- 1}$

$1.25 \times 1 0^{- 10} m o l L^{- 1}$

$0.10 m o l L^{- 1}$

$[S O_{4}^{2 -}] = 0.01 m o l L^{- 1}$
$K_{s p} = [p b^{2 +}] [S O_{4}^{2 -}]$
or $[p b^{2 +}] = K_{s p} [S O_{4}^{2 -}]$
$= \frac{1.25 \times 1 0 ^{- 9}}{0.01}$

Q. What is the solubility of PbSO4​ in 0.01 M Na2​SO4​ solution if Ksp​ for PbSO4​ is 1.25×10−9 ?

1.25×10−7molL−1

1.25×10−9molL−1

1.25×10−10molL−1

0.10molL−1