Chapter 17.6, Problem 2CP

Barium nitrate is added slowly to a solution that is $0.10M{\text{ in SO}}_4^{2-}$ ions and $0.10M{\text{ in F}}^{\text{-}}$ ions. Calculate the concentration of ${\text{Ba}}^{\text{2+}}$ ions (in mol/L) required to initiate the precipitation of ${\text{BaSO}}_{\text{4}}$ without precipitating ${\text{BaF}}_{\text{2}}$.

a)

$\text{1}\text{.7}\times {\text{10}}^{\text{-6}}M$

b)

$\text{1}\text{.1}\times {\text{10}}^{\text{-9}}M$

c)

$\text{1}\text{.7}\times {\text{10}}^{\text{-4}}M$

d)

$\text{1}\text{.7}\times {\text{10}}^{\text{-5}}M$

e)

$\text{1}\text{.1}\times {\text{10}}^{\text{-8}}M$