Question

Silver chloride is sparingly soluble in water because its lattice energy is greater than _____ energy.
A.Hydration
B.Ionization
C.Lattice
D.None of these

Answer 1

Hint: A salt is water soluble if its hydration energy is equal to or greater than the lattice energy. Lattice energy is the measure of ionic bond strength of ionic compounds. It is the energy required to convert one mole of an ionic solid into their gaseous ions.

Complete step by step answer:
1.Silver chloride has the chemical formula $AgCl$. It is a white crystalline solid. It is an ionic compound which contains $A{g^ + }$ and $C{l^ - }$ ions. Its properties are-
-It is insoluble in water, alcohol and dilute acids.
-It is soluble in ammonia and concentrated acids like conc. Nitric acid.
-It is a photosensitive material and decomposes into its silver metal and elemental chlorine under the light.
2.Hydration energy is the amount of energy which is released when one mole of ions undergo hydration.
3.If a salt is dissolved in the water then if the hydration energy is higher than the lattice energy then the outermost ions move away from lattice and become covered with neighboring water molecules, then the molecule is water soluble.
4.If the lattice energy is higher than hydration energy then the outermost ions of the lattice are held in place which makes the molecule sparingly soluble.
5.Silver chloride is sparingly soluble in water because its lattice energy is greater than the hydration energy.

Hence the correct answer is option A.

Note:
Silver chloride is used as-
1.It is used in preparation of photographic films and photographic lenses.
2.It is used in antimicrobial products as it has antiseptic properties.
3.It is used as an antidote for mercury poisoning.
4.It is also used in healing products and in water treatment.