Question

`Pb(IO_(3))_(2)` is a sparingly soluble salt `(K_(sp) = 2.6 xx 10^(-13))`. To `35mL` of `0.15M Pb(NO_(3))_(2)` solution, `15mL` of `0.8M KIO_(3)` solution is added, and a precipiatte of `Pb(IO_(3))_(2)` is formed.
What will be the molarity of `IO_(3)^(Theta)` ions in the solution after completion of the reaction?
A. `0.152`
B. `0.081`
C. `0.41`
D. `0.03`

Answer 1

Correct Answer - D
`[IO_(3)^(Theta)] = (1.5 "mmol")/((15+35) mL) = 0.03M1`