Answer to Question #143451 in General Chemistry for Aida

Question

Arrange the following compounds in the order of increasing Ksp: AgCl, AgBr, AgI. Explain your reasoning.

Answer 1

$AgI<AgBr<AgCl$

Silver is a large sized molecule with a high molecular mass and radius. As we go down the group in a periodic table, we observe that the atomic radius generally increases. A large molecule has a better interaction with another large molecule (Iodine in this case) and hence will not dissociate easily, let alone be soluble in another liquid forming new hydromolecular bonds. Thus the solubility of Silver with halogens decreases down the group.