1. Hydrogen Bonding:
* Ammonia: Ammonia can form hydrogen bonds with water molecules. The nitrogen atom in ammonia has a lone pair of electrons, which can form a hydrogen bond with the partially positive hydrogen atom of water.
* Carbon Tetrachloride: Carbon tetrachloride cannot form hydrogen bonds. The carbon atom is surrounded by four chlorine atoms, which are highly electronegative, making the carbon atom slightly positive. However, the chlorine atoms are too electronegative to form hydrogen bonds.
2. Polarity:
* Ammonia: Ammonia is a polar molecule. The nitrogen atom has a lone pair of electrons, making it slightly negative, while the hydrogen atoms are slightly positive.
* Carbon Tetrachloride: Carbon tetrachloride is a nonpolar molecule. The tetrahedral shape and symmetrical distribution of chlorine atoms result in equal sharing of electrons, leading to no net dipole moment.
3. "Like Dissolves Like":
* Water is a polar solvent, and ammonia's polarity allows it to readily dissolve in water.
* Carbon tetrachloride is nonpolar and therefore does not dissolve well in water. Instead, it would dissolve in nonpolar solvents like hexane or benzene.
In summary:
The ability of ammonia to form hydrogen bonds with water, its polarity, and the "like dissolves like" principle all contribute to its high solubility in water compared to carbon tetrachloride.
