What is the molecular shape of nh3?
A quick explanation of the molecular geometry of NH3 including a description of the NH3 bond angles. The NH3 molecular geometry (molecular shape) is trigonal pyramidal. The NH3 bond angles are 107 degrees because the hydrogen atoms are repelled by the lone pair of electrons on the Nitrogen atom.
NH3 = Hydrogen bonds AND instantaneous dipoles F2 = Instantaneous dipoles HCl = Permanent dipoles AND instantaneous dipoles NH3 and HCl both have temporary and permanent dipoles, as they are polar molecules. However, NH3 has H-bonding, which means the boiling point is higher due to these stronger forces of attraction.
- HCl molecules, for example, have a dipole moment because the hydrogen atom has a slight positive charge and the chlorine atom has a slight negative charge. Because of the force of attraction between oppositely charged particles, there is a small dipole-dipole force of attraction between adjacent HCl molecules.
- H2O has dispersion, dipole-dipole, and hydrogen bonding. Cl2 has only dispersion forces and is non-polar. HCl had dispersion forces but also is dipole-dipole. SMALLER compounds are generally MORE soluble in water than larger compounds with similar structures.
- Because the IMFs in HF are so much stronger than HBr (hydrogen bonds vs. dipole- dipole), I would expect HF to have a much higher boiling point than HBr. F2 and HBr are a pair of a polar and nonpolar molecule, so the IMFs they have are induced dipole because of the polar nature of HBr.
Updated: 28th November 2019