A polar solvent is composed of molecules, such as H2O, that have a discernible asymmetry in their surface electromagnetic charge. Water molecules consist of one oxygen atom single-bonded to two hydrogen atoms that are grouped together on one side of the molecule. This concentrates a negative charge at one pole.
polar molecule has a net dipole as a result of the opposing charges (i.e. having partial positive and partial negative charges) from
polar bonds arranged asymmetrically. Water (H
2O) is an example of a
polar molecule since it has a slight positive charge on one side and a slight negative charge on the other.