Question

Is H2CO3 a polar molecule?

Answer 1

Yes, `"H"_2"CO"_3` is a polar molecule.

Explanation:

The Lewis structure of `"H"_2"CO"_3` is

(from employees.csbsju.edu)

With respect to the carbon atom, this is an `"AX"_3` system,

The geometry about the `"C"` atom is trigonal planar, but the `"C=O"` dipole is not balanced by the `"C-O"` dipoles.

So the molecule is polar.