Chapter 37, Problem 1P

To determine

Whether $\text{NaCl}$ molecule is polar or nonpolar.

Explanation of Solution

Introduction:

Most of the non-polar molecules don't have a dipole moment in them, while if in case the dipole moment is present, it may be due to the external electric or magnetic fields while Polar molecules always have some dipole moment present in it. Polar molecules are water soluble and non-polar moleculesare fat soluble.

In $\text{NaCl}$ molecule, the center of charge of the positive ioncontains ${\text{Na}}^{\text{+}}$ and center of charge of negative ion contains ${\text{Cl}}^{-}$ and they do not coincide. So, there is permanent dipole moment present in the $\text{NaCl}$ . The $\text{NaCl}$ molecule shows the property which is same as polar molecules. Thus, $\text{NaCl}$ molecule is polar molecule.

Conclusion:

Thus, the $\text{NaCl}$ molecule is polar.