why is ammonia highly soluble in water


It s pretty hard to draw Lewis structures in this format, but I can link you:
For water: For ammonia: Ammonia is very soluble in water because both molecules are capable of hydrogen bonding. Hydrogen bonding can happen when two conditions are met: (A) a molecule has hydrogen atoms bonded directly to extremely electronegative atoms like O, N, or F, and (B) the electronegative atoms have lone pairs of electrons. Both conditions are met in water and ammonia. The extremely electronegative oxygen and nitrogen atoms draw electrons away from the hydrogens to which they are bonded, which leaves the hydrogen atoms nearly stripped of electrons and carrying a partial positive charge. The positive charge of the hydrogen atoms is strongly attracted to the lone pairs on other oxygen and/or nitrogen atoms, and because hydrogen atoms are so small, they can get very close.


This causes a relatively strong attraction between molecules that are capable of hydrogen bonding, and it ensures that ammonia and water will mix very well together. I hope that helps. Good luck! Why is NH3 (Ammonia) soluble in water? December 4, 2010, Why is NH3 (Ammonia) soluble in water? Solubility of a substance in water depends on its polar nature. Since water is polar molecule, it dissolves readily polar molecules. As it is said in chemistry that like dissolves like,б, polar compounds dissolve polar molecules. The solubility of gas in water depends also on the temperature and pressure of the gas. Gases dissolve in water at high pressures and low temperatures. Ammonia is a gas and it is soluble in water. The solubility of ammonia in water determines the polarity of ammonia.


Ammonia will be more soluble when the temperature of the solution is lower and the partial pressure of ammonia on water is higher. Hydrogen bonding aids in solubility of ammonia in water. The water has two hydrogen atoms and one oxygen atom. The oxygen is more electro negative than hydrogen and hence the electrons are pulled towards the most electro negative element oxygen. This makes the oxygen to have partial negative charge and the hydrogen with partial positive charge. The same thing happens in the case of ammonia formation. The most electro negative element is nitrogen in ammonia compared to hydrogen. So the shared electrons are pulled towards the nitrogen and hence it possesses partial negative charge. The hydrogen possesses partial positive charge.

This similar type of distribution of electrons in water and ammonia determines their polar nature. As both water and ammonia are Polar, ammonia can get dissolved in water. As Oxygen is more electro negative than nitrogen, water acts as solvent here and not ammonia. Moreover, water is a universal solvent. The reason behind the solubility of ammonia in water is the ease in the formation of hydrogen bonds between them. The oxygen atoms in water and nitrogen atoms in ammonia form hydrogen bonds with the hydrogen in the opposite molecule. The formation of hydrogen bonds between these two molecules is responsible for the ammonia getting dissolved in water. Why is MLA Format used? Why is NH3 (Ammonia) a weak electrolyte? This was an awesome article, really helped me out!

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