Question

What compound if any, will precipitate when 80 ml of 1.0 x 10^-5m ba(oh)2 is added to 20 ml of 1.0 x 10^-5m fe2(so4)3? (ksp for baso4 = 1.1 x 10^-10 and ksp for fe(oh)3 = 2.6 x 10^-39$

Answer 1

BaSO4 will not precipitate when Ba(OH)2 and Fe2(SO4)3 are mixed.

Step-by-step explanation:

When Ba(OH)2 and Fe2(SO4)3 are mixed, the possible precipitates that can form are BaSO4 and Fe(OH)3. To determine which compound will precipitate, we need to compare the solubility product constant (Ksp) values for BaSO4 and Fe(OH)3 with the reaction quotient (Q) for the reaction.

For BaSO4:

Ksp for BaSO4 = 1.1 x 10^-10

Q = [Ba²+][SO4²-] = (1.0 x 10^-5)(1.0 x 10^-5) = 1.0 x 10^-10

Since Q < Ksp for BaSO4, BaSO4 will not precipitate.

For Fe(OH)3:

Ksp for Fe(OH)3 = 2.6 x 10^-39

Q = [Fe²+][OH-]²

However, we were not provided with the concentrations of Fe²+ and OH-. Therefore, we cannot determine whether Fe(OH)3 will precipitate based on the given information.