Question

6. What type(s) of intermolecular forces exist between NH3 and PO43-? A) dispersion forces B) dispersion forces, ion-dipole, and dipole-dipole C) dispersion forces and dipole-dipole D) dispersion forces and ion-dipole E) dispersion forces, ion-dipole, dipole-dipole, and hydrogen bonds

Answer 1

Ammonia (NH₃) is a neutral molecule but polar in nature but phosphate PO₄^-3 is a charged molecule and obviously polar.

Therefore theyexhibits all kinds of van der Waals forces:

1. Keesom forces (dipole-dipole attraction),

2. Debye forces (induced attraction)

3.London dispersion forces

4. Hydrogen bonding

5. ion dipole interaction (only for Phosphate but not ammonia)

As a whole, the correct option is  d which includes dispersion forces, ion-dipole, dipole-dipole and hydrogen bonds.