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Asked by Vishnu Last Modified
Answer Of the two ions you mentioned, PCl₄⁻ (tetrahedral tetrachlorophosphate ion) is more likely to exist than PCl₄⁺ (tetrahedral tetrachlorophosphonium ion). This is because phosphorus typically forms covalent bonds with other atoms, such as chlorine in this case, rather than losing or gaining electrons to form ions.
In PCl₄⁻, phosphorus has a valence electron configuration of 3s²3p³. By accepting four electrons from chlorine atoms, phosphorus completes its octet, achieving a more stable electron configuration. This is consistent with the tendency of elements to gain electrons to achieve a noble gas configuration.
However, for PCl₄⁺ to exist, phosphorus would need to lose its lone pair of electrons, which is less energetically favorable due to the electronegativity difference between phosphorus and chlorine. Additionally, the formation of positively charged phosphorus is less common because phosphorus typically forms covalent bonds rather than losing electrons.
Therefore, PCl₄⁻ is more likely to exist than PCl₄⁺ due to the stability gained through electron gain rather than electron loss.
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