Twenty-five milliliters of are mixed with of an aqueous KI solution

CHEMISTRY · Subjective · AP · Chemistry · Equilibrium · Equilibrium

Problem

Twenty-five milliliters of

0.0200\,\text{M}\;\text{Pb(NO}_3)_2

are mixed with

15.0\,\text{mL}

of an aqueous KI solution, giving a final mixture volume of

40.0\,\text{mL}

. The solubility-product constant for PbI

_2

at 25 °C is

7.1\times10^{-9}

. Calculate the minimum molar concentration of the KI solution that will cause PbI

_2

to start precipitating in the mixture.