boric acid-total # of electrons,# of valence electrons,#s of single, double and triple bonds,total #lone pairs

Question

# of lone pairs on central atom,# of atoms attached directly to central atom, geometry, is it a polar molecule?

Answer 1

lone pairs on central atom=1

atoms directly attached to central atom= 3( three oxygen atoms)

not a polar molecule

structure: planar

bonds: 3 single bonds between B & O and 3 single bonds between O &H atoms

Answer 2

Boric acid is best written as B(OH)3. It is a molecule in which the central atom does not have enough electrons, so is described as a Lewis acid and not a Bronsted-Lowry acid. There are 3 equal -OH bonds at 120 degrees on the B atom, which only has 6 electrons in its outer level. The shape is describes as trigonal planar. There are no double or triple bonds.