Silver iodide is ...

Silver iodide is ...

• A. Soluble
• B. Insoluble
• C. Partly soluble
• D. Dissolves in acid

Answer: (B)

Solubility of a salt is governed by how easily its lattice can break apart into ions in water. For sparingly soluble salts, the solubility product (Ksp) is very small, so only a tiny amount dissolves and the solid remains. Silver iodide has an extremely small Ksp (around 8×10^-17 at room temperature), which means the concentrations of Ag+ and I- in any solution are vanishingly small. Because of this, AgI is effectively insoluble in water and stays as a solid. It also doesn’t dissolve in acid under normal conditions. The result is best described as insoluble.

Solubility of a salt is governed by how easily its lattice can break apart into ions in water. For sparingly soluble salts, the solubility product (Ksp) is very small, so only a tiny amount dissolves and the solid remains. Silver iodide has an extremely small Ksp (around 8×10^-17 at room temperature), which means the concentrations of Ag+ and I- in any solution are vanishingly small. Because of this, AgI is effectively insoluble in water and stays as a solid. It also doesn’t dissolve in acid under normal conditions. The result is best described as insoluble.