Ammonia: Pure NH3 is a colorless gas with a sharp, characteristic odor. It is easily liquified by pressure, and is very soluble in water. Ammonia acts as a weak base. Aqueous solutions of ammonia are (incorrectly) referred to as 'ammonium hydroxide'.

 

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Ammonia: Pure NH3 is a colorless gas with a sharp, characteristic odor. It is easily liquified by pressure, and is very soluble in water. Ammonia acts as a weak base. Aqueous solutions of ammonia are . . . View Full Definition

Sal-Ammoniac: Ammonium chloride. Used in some high speed developers.

Base Hydrolysis Constant: The equilibrium constant for the hydrolysis reaction associated with a base. For example, Kb for ammonia is the equilibrium constant for NH3(aq) + H2O(ell) doublearrow NH4+(aq) + OH-(aq), or . . . View Full Definition

Ammonium Ion: (NH4+) ammonium NH4+ is a cation formed by neutralization of ammonia, which acts as a weak base.

Law Of Combining Volumes: When gases react, they do so in a definite proportion by volume, if the volumes are measured at the same pressure and temperature. For example, in the reaction N2(g) + 3 H2(g) = 2 NH3(g), 3 . . . View Full Definition

Monodentate: A ligand that has only one atom that coordinates directly to the central atom in a complex. For example, ammonia and chloride ion are monodentate ligands of copper in the complexes [Cu(NH3)6 . . . View Full Definition

Petrochemicals: Organic and inorganic compounds and mixtures that are derived from petroleum. These include: organic chemicals, cyclic inter¬mediates, plastics, resins, synthetic fibers, elastomers, organic . . . View Full Definition

Weak Base: A base that only partially dissociates into ions in solution. Weak bases are weak electrolytes. Ammonia is an example of a weak base; the reaction NH3(aq) + H2O(l) = NH4_+(aq) + OH-(aq) is r . . . View Full Definition

Amphiprotic Solvent: Solvents that exhibit both acidic and basic properties; amphiprotic solvents undergo autoprotolysis. Examples are water, ammonia, and ethanol.

Ammine: `A metal ion complex containing ammonia as a ligand. The ammonia nitrogen is bound directly to a metal ion in ammines; amines differ in that the ammonia nitrogen is directly bound to a carbon atom.