A 1.0 L solution contains 0.050 M and 0.050 M

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

Problem

A 1.0 L solution contains 0.050 M

Ba^{2+}

and 0.050 M

Sr^{2+}

. Sulfate ion is added slowly until 99.99 % of the

Ba^{2+}

has precipitated as

BaSO_4

. Assuming no change in volume, what percentage of the original

Sr^{2+}

remains in solution at that point? (

K_{sp}(BaSO_4)=1.1\times10^{-10}

;

K_{sp}(SrSO_4)=3.2\times10^{-7}

) (a) Approximately 58 % (b) Approximately 100 % (c) Approximately 29 % (d) Approximately 3 %