PbCl2 is ionic but PbCl4 is covalent why
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The charge on Pb in PbCl2 is +2 & PbCl4 is +4.According to Fajan's rule,greater the charge on the cation,more is its ability to polarize the bonding electrons towards itself giving the compound a higher covalent character.PbCl4 has a greater charge & hence is covalent.As charge on PbCl2,therefore Pb is not able to polarise the bonding electrons in PbCl2.Hence,PbCl2 is ionic.
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Explanation:
The charge on Pb in PbCl2 is +2 and PbCl4 is +4. According to Fajan's rule, greater the charge on the cation, more is its ability to polarize the bonding electrons towards itself giving the compound a higher covalent character. PbCl has a greater charge and hence is covalent.
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