Is hybridization of of As in AsF4- sp3d. If so why.?

Dear student

The AsF4- ion has  As  as the central ion , This has 5 electrons in its valence shell.
As the ion is negatively charged, there are 6 electrons in total, thus 4 F atoms form 4 bond pairs and one lone pair is present, 
Hence total electron pairs = 5
The hybridisation is sp3d and geometry is trigonal bipyramidal.


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