What is nh3 aqueous solution?

NH3 aqueous means aqueous solution of ammonia or ammoniumhydroxide which is also known as aqueous ammonia, aqua ammonia, ammoniacal liquor, ammonia liquor, ammonia water etc.

Ammonia is super soluble in water. When ammonia dissolves in water it forms alkaline solution of ammonium hydroxide due to formation of hydrogen bond with water molecule.

NH3 aqueous is commonly known as ammonium hydroxide with chemical formula NH4OH, though ammonium hydroxide molecule has no existence. Because of in aqueous solution it ionized into NH4+ and OH– ions.

NH3 (g) + H2O (l) ⟶ NH4OH (aq.) ⇌ NH4+(aq.) + OH– (aq.)

NH3 aqueous or aqueous solution of ammonia may be two types, namely, concentrated solution and diluted solution.

The concentrated solution of ammonia is called liquor ammonia. Liquor ammonia solution contains 35% of ammonia.

Since ammonia forms ammonium hydroxide with water molecules hence the formula of NH3 aqueous is NH4OH. The molar mass of NH3 aqueous or ammonium hydroxide is 35.04 g /mol.

NH3 aqueous is a fishy and highly pungent solution. The density of nh3 aqueous solution is 880 kg/m3 and its boiling point is 310.8 K.

What is the basicity of NH3 aqueous solution?

Ammonia is a weak base. Because of in NH3 aqueous solution, ammonium hydroxide dissociates into NH4+ and OH– ions. That is, the solution becomes OH– ion rich.

Since ammonia is a weak base, the pH value of NH3 aqueous solution can’t determined directly.

It can be determined indirectly by calculating the dissociation constant (Kb) and the concentration of NH4OH, using the given following equation.

pH = 14–1/2pKb + 1/2logc

The ionization of NH3 aqueous solution is as follows, NH4OH = NH4+ + OH-

Now, in 1(M) ammonia solution, about 0.42% of the ammonia is converted to ammonium hydroxide.

Therefore, the [NH4+] = [OH−] = 0.0042 (M).

Hence, pH = 14 + log [OH−] = 14 + log [0.0042]

14–2.374 =11.6

Therefore, the pH of 1(M) NH3 aqueous or ammonium hydroxide is 11.6.

What are the uses of NH3 aqueous?

Use in laboratory

NH3 aqueous or ammonium hydroxide solution is used as a very important laboratory reagent for qualitative analysis in inorganic chemistry.

It is one of the constituent of alkaline buffer [NH3 (aq.) + NH4Cl] which is used in the group separation of metal ions. For this reason, NH3 aqueous solution is also known as group reagent.

Use as a precursor of amines

NH3 aqueous or ammonium hydroxide solution is used as a precursor of different types of amines, methyl amine, ethyl amine, phenyl amine, chloramines, and many other secondary and tertiary amines.

Use as a cleaner

NH3 aqueous or aqueous solution of ammonia is commonly used as a good house hold cleaner. Generally diluted aqueous ammonia solution (1% — 3%) is used as a household cleaner for many surfaces.

This is because ammonia, as a cleanser, makes an object streak-free shine. One of its most common uses is to clean glass, window, porcelain, and stainless steel. It is also used for cleaning ovens and soaking to loosen bakes-on grime.

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