The following lead(II) salts are considered: • • • Which option correctly lists the…

CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium

Problem

The following lead(II) salts are considered: • Pb(OH)2  (Ksp=1.2×10−15)\text{Pb(OH)}_2\;(K_{sp}=1.2\times10^{-15}) • PbSO4  (Ksp=1.6×10−8)\text{PbSO}_4\;(K_{sp}=1.6\times10^{-8}) • PbCl2  (Ksp=1.7×10−5)\text{PbCl}_2\;(K_{sp}=1.7\times10^{-5}) Which option correctly lists the salts in order of decreasing molar solubility at pH\,7.0 and again at pH\,13.0? (a) pH 7.0: PbCl2>PbSO4>Pb(OH)2\text{PbCl}_2 > \text{PbSO}_4 > \text{Pb(OH)}_2 ; pH 13.0: PbCl2>PbSO4>Pb(OH)2\text{PbCl}_2 > \text{PbSO}_4 > \text{Pb(OH)}_2 (b) pH 7.0: PbCl2>PbSO4>Pb(OH)2\text{PbCl}_2 > \text{PbSO}_4 > \text{Pb(OH)}_2 ; pH 13.0: Pb(OH)2>PbCl2>PbSO4\text{Pb(OH)}_2 > \text{PbCl}_2 > \text{PbSO}_4 (c) pH 7.0: Pb(OH)2>PbCl2>PbSO4\text{Pb(OH)}_2 > \text{PbCl}_2 > \text{PbSO}_4 ; pH 13.0: PbCl2>PbSO4>Pb(OH)2\text{PbCl}_2 > \text{PbSO}_4 > \text{Pb(OH)}_2 (d) pH 7.0: PbCl2>Pb(OH)2>PbSO4\text{PbCl}_2 > \text{Pb(OH)}_2 > \text{PbSO}_4 ; pH 13.0: PbCl2>PbSO4>Pb(OH)2\text{PbCl}_2 > \text{PbSO}_4 > \text{Pb(OH)}_2

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