Lewis Structure:
[Image of Lewis Structure of H3O+ showing Oxygen with three hydrogens and one lone pair]
Molecular Geometry: Trigonal Pyramidal
Electron Geometry: Tetrahedral
Hybridization of the Central Atom (Oxygen): sp3
Polarity: Polar
Explanation:
The oxygen atom has three single bonds to hydrogen atoms and one lone pair of electrons. This gives the molecule a tetrahedral electron geometry, but the lone pair distorts the shape, resulting in a trigonal pyramidal molecular geometry.
The oxygen atom is sp3 hybridized because it has four electron domains (three bonds and one lone pair).
The molecule is polar because the oxygen atom is more electronegative than the hydrogen atoms, creating a dipole moment.