Is PCl5 ionic or covalent?
Understand the Problem
The question is asking about the chemical nature of phosphorus pentachloride (PCl5), specifically whether it forms ionic or covalent bonds. To answer this, we need to consider the bonding characteristics of the elements involved and the molecular structure of PCl5.
Answer
PCl5 is covalent in the gaseous phase and ionic in the solid state.
PCl5 is covalent in the gaseous phase and behaves like an ionic compound in the solid state.
Answer for screen readers
PCl5 is covalent in the gaseous phase and behaves like an ionic compound in the solid state.
More Information
In gaseous and liquid forms, PCl5 exists as discrete molecular entities with covalent bonds. In the solid state, however, it forms an ionic lattice due to stabilization of the larger PCl6- and smaller PCl4+ ions.
Tips
A common mistake is to assume PCl5 behaves the same way in all states. Pay attention to state-specific behavior.
Sources
- Why is PCl5 ionic in a solid state? - iitchemistry.quora.com
- Does phosphorus pentachloride have ionic or covalent compounds? - answers.com
- What is the actual reason behind PCl₅ existing as an ionic solid? - chemistry.stackexchange.com
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