Why are polar molecules hydrophilic?

1 Answer
Mar 16, 2014

Water is a hydrophilic molecule. The water molecule act like a dipole. Water molecule consists of two hydrogen atoms and one oxygen atom. Hydrogen atoms are bonded to the central Oxygen atom through covalent bond. Oxygen has a larger electronegativity than hydrogen, so the electron pair shared between each Hydrogen and Oxygen atom is pulled in closer to the oxygen atom, giving it a partial negative charge. Subsequently, both of the hydrogen atoms take on a partial positive charge. This along with the shape of the water molecule makes it suitable for polar molecules.

Water is a dipole and acts like a magnet, with the oxygen end having a negative charge and the hydrogen end having a positive charge. These charged ends can attract other polar molecules.

Ammonia is a polar molecule, with the Nitrogen end having a negative charge and the hydrogen ends having a positive charge.This molecule is attracted by water or this molecule is water loving or (hydrophlic). The Positive ends of water molecule
( Hydrogen atoms) binds with the negative end of ammonia molecule . The positive ends of the ammonia molecule binds or is attracted by the negative end of the water molecule.