Question

Why pcl3 is liquid while pcl5 is solid at room temperature

Answer 1

Pcl15 is actually solid at room temperature...... because it foam salt, 'tetrachloridephonium hexaflurophosphate' ........ Pc13 is liquid at room temperature, bcz the chosphorus atom is so electronegative, to have a chloride ion abstracted....

Answer 2

Pcl3 is liquid whereas the pcl5 is solid at room temperature

because the greater the temperature goes above that, the more the phosphorus(V) chloride dissociates to provide phosphorus(III) chloride and chlorine. Solid phosphorus(V) chloride constitutes ions - so it is a solid at room temperature.

• PCl5 does something which is not instantly noticeable from its molecular formula, it autoionizes and evolves an ionic solid PCl4+PCl6−.
• As such, it maintains much stronger exchanges than PCl3 with its more dipole-dipole attractions, than the higher melting point.
• At room temperature, phosphorus trichloride occurs as a liquid but it is volatile. When phosphorus trichloride arrives in communication with moisture it withstands hydrolysis. it responds violently with water. The reaction of phosphorus trichloride with water provides smokes of hydrogen chloride gas.

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