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apply fazan's rule,

greater the charge on cation more is the polarising power and hence more covalent character

polarising power of pb4+>pb2+

thus pbcl4 is more covalent than pbcl2

conversely pbcl2 more ionic than pbcl4

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11y ago
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6y ago

Because of the large difference in electronegativities, a metal such as lead would be expected to form an ionic compound with chlorine, as is seen in PbCl2. Howevern, in the case of PbCl4, 4+ charge on a lead IV ion is rather unstable, and attracts electrons from the chloride ion enough to form a covalent bond.

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Q: Why Pbcl2 is ionic and Pbcl4 is covalent?
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