Step 1:Arsenic (EN = 2.18) is much less electronegative than oxygen (3.44) soarsenic is the main atom.
You are watching: Write lewis structure for aso3 3
Step 2:The total variety 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 room 4 domains or teams around main element As:
▪4 O atoms= 4 domains
• that will require 4 orbitals come accommodate this 4 groups.
Orbitals that deserve to be used by the main atom:
Subshell full # the orbitals
s _ 1 orbit
ns _ _ _ 3 orbitals
d _ _ _ _ _ 5 orbitals
▪1 s orbit + 3 p orbitals = 4 orbitals (4 groups)
▪s p p p = sp3
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Draw the Lewis framework of ASO43- mirroring all lone pairs.
What is the hybridization that the main As atom?
An AsO43- ion is
Identify the molecular geometry that AsO43-.
c) square pyramidal
d) trigonal planar
f) square planar
h) trigonal bipyramidal
i) trigonal pyramidal
What room the almost right bond angles in ASO43-?
a) 90 degrees
b) 109 degrees
c) 120 degrees
d) 180 degrees
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