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Why this ionic halides ar insoluble in water ?
why this ionic halides ar insoluble in water ?.... please check
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Priyanshu kumar Best Answer
1) FAJAN'S RULE : The covalency introduced in a compound can be well described from Fajan's Rule . The polarising power depends on charge to radius ratio (Charge by radius ratio rule). In case of AgCl , the silver ion (Ag) has greater effective nuclear charge compared to Sodium (Na) in NaCl. The Ag+ having more polarising power distorts the electron cloud of the corresponding anion Cl- and because of polarisation, covalent character is introduced in the compound. Because of covalent nature of AgCl, it is less soluble in water . 2) SOLUTION CHEMISTRY : AgCl is a covalent one(non polar). There is a rule in solution chemistry named "LIKE DISSOLVES LIKE". Covalent AgCl being non polar in nature will favour non polar solvents like CCl4 rather than polar solvent water. # It can be also explained from the lattice energy concept. For AgCl the hydration energy is less compared to lattice energy. So AgCl will not dissolve in water like NaCl. Similarly these all insoluble halides are explained.