Step 1:Arsenic (EN = 2.18) is less electronegative than oxygen (3.44) soarsenic is the central atom.
You are watching: Aso4 3- polar or nonpolar
Step 2:The total number of valence electrons present in AsO43- is:
Group Valence Electrons
As 5A 1 × 5 e– =5 e–
O 6A 4 × 6 e– =24 e–
From -3 charge: +3e-
Total: 32 valence e–
Step 3:The Lewis Structure is:
Step 4: There are 4 domains or groups around central element As:
▪4 O atoms= 4 domains
• It will need 4 orbitals to accommodate these 4 groups.
Orbitals that can be used by the central atom:
Subshell Total # of orbitals
s _ 1 orbital
p _ _ _ 3 orbitals
d _ _ _ _ _ 5 orbitals
▪1 s orbital + 3 p orbitals = 4 orbitals (4 groups)
▪s p p p = sp3
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Draw the Lewis structure of ASO43- showing all lone pairs.
What is the hybridization of the central As atom?
An AsO43- ion is
Identify the molecular geometry of AsO43-.
c) square pyramidal
d) trigonal planar
f) square planar
h) trigonal bipyramidal
i) trigonal pyramidal
What are the approximate bond angles in ASO43-?
a) 90 degrees
b) 109 degrees
c) 120 degrees
d) 180 degrees
Learn this topic by watchingHybridization Concept Videos
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Frequently Asked Questions
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