Main article: ammonia

Ammonium hydroxide(NH4OH), also known as ammonia water, aqua ammonia, or aqueous ammonia, is a solution of ammonia in water. Ammonia is a compound with the formula N[[hydrogen H3]] It is normally encountered as a Gas with a characteristic pungent Odor Ammonia is a compound with the formula N[[hydrogen H3]] It is normally encountered as a Gas with a characteristic pungent Odor Technically, the use of the term "ammonium hydroxide" is incorrect because such a chemical compound is not isolatable. However, this term does give a fair description of how an ammonia solution behaves, and is commonly used even by scientists and engineers.

## Chemistry

In aqueous solution, ammonia deprotonates some small fraction of the water to give ammonium and hydroxide according to the following equilibrium:

NH3 + H2O $\rightleftharpoons$ NH4+ + OH

With a base ionization constant (Kb) of 1. Ammonium is also an old name for the Siwa Oasis in western Egypt. In Chemistry, hydroxide is the most common name for the diatomic Anion OH− consisting of Oxygen and Hydrogen In a Chemical process, chemical equilibrium is the state in which the chemical activities or Concentrations of the reactants and products have no net change 8×10−5, in a 1M ammonia solution about 0. Ammonia is a compound with the formula N[[hydrogen H3]] It is normally encountered as a Gas with a characteristic pungent Odor 42% of the ammonia will gain protons to become ammonium ions (equivalent to a pH of 11. Ammonium is also an old name for the Siwa Oasis in western Egypt. 63).

Aqueous ammonia is used in traditional qualitative inorganic analysis. Like many amines, it gives a deep blue coloration with copper(II) solutions. Ammonia solution can dissolve silver residues, such as that formed from Tollens' reagent. Tollens' reagent is usually ammoniacal silver nitrate but can also be other compounds as long as there is an aqueous diamminesilver(I complex.

Solutions of ammonium can also dissolve reactive metals such as zinc, with the liberation of hydrogen gas. When ammonium hydroxide is mixed with dilute hydrogen peroxide in the presence of a metal ion, such as Cu2+, the peroxide will undergo rapid decomposition. Hydrogen peroxide (H2O2 is a very pale blue liquid which appears colorless in a dilute solution slightly more Viscous than water