Final answer:
The molar solubility of ionic solids depends on the solubility product constant (Ksp) and all three ionic solids would have the same molar solubility since they have the same Ksp value.
Step-by-step explanation:
The molar solubility of an ionic solid is the maximum amount of the solid that can dissolve in a given amount of solvent at a specific temperature. In this case, we are comparing the molar solubilities of three different ionic solids with the same Ksp value of 5.5×10−7.
The molar solubility of an ionic solid is determined by the solubility product constant (Ksp), which is the equilibrium constant for the dissolution of the solid into its constituent ions. The higher the value of Ksp, the more soluble the compound.
Therefore, the ionic solid with the highest molar solubility would be the one with the highest Ksp value. However, since all three ionic solids have the same Ksp value, they would have the same molar solubility.