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Complete Hydrolysis of XeF4 and XeF6 Results in the formation of XeO3. Explain

When XeF4 and XeF6 are completely hydrolyzed, XeO3 is produced.

Xenon is a noble gas element from the fifth periodic table.

Let’s write Xenon’s electronic configuration.

Xe=Kr4d105s25p6 

  • The valence shell of xenon has eight electrons. It also has a 5d orbital that is vacant. Six covalent connections are established between the six fluorine atoms in xenon hexafluoride.

  • The sp3d3 hybridization of xenon produces seven sp3d3 hybrid orbitals. One electron per sp3d3 orbital, and one sp3d3 orbital has a lone pair of electrons. To produce xenon hexafluoride, XeF6, the six unpaired electrons are coupled with six electrons from six fluorine atoms.

  • The geometry is deformed octahedral due to the presence of one lone pair of electrons.

  • When xenon hexafluoride is fully hydrolyzed, it produces xenon trioxide (XeO3) and hydrofluoric acid (HF).

XeF6+3H2O→XeO3+6HF

  • Xenon is sp3 hybridised in xenon trioxide. There are four sp3 orbitals in all, three of which contain one electron apiece and one of which contains one lone pair of electrons. With three oxygen atoms, three sp3 orbitals will create a sigma bond.

  • There will be three 5d orbitals with three unpaired xenon electrons remaining. To form three pi-bonds, these three 5d orbitals will laterally overlap with three 2p orbitals of three oxygen atoms.

  • Due to the presence of one lone pair of electrons, the resultant structure is XeO3, which has a pyramidal geometry.

  • As a result, full hydrolysis of XeF6 yields XeO3.

Complete Hydrolysis of XeF4

6XeF4+12H2O→4Xe+2XeO3+24HF+3O2

When xenon fluoride is partially hydrolyzed, it yields xenon oxyfluoride (XeOF2).