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Silver iodide is a very insoluble compound. Please give reasons for compounds like silver sulfate or...

Silver iodide is a very insoluble compound. Please give reasons for compounds like silver sulfate or silver chloride to be insoluble that relate to lattice energy versus energy of hydration.

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Answer #1

If lattice energy is greater than energy of hydration then that salt is insoluble in water. Silver iodide, silver sulfate and silver chloride all these are insoluble in aqueous solution. Because all these salts are having greater lattice energy when compare with hydration energy, that is why they are insolble in aqueous solutions.

Silver idodide is very insoluble compound because Ag-I bond is so strong. Ag+ is soft acid and I- is soft base so soft acid form strong bond with soft base. Hence it has greater lattice energy and very insoluble in aqueous solution.

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