The solution can be flushed down the drain with water.

Make sure the solution is within the proper pH range. Corrosivity to Metals: Dilute ammonium hydroxide solutions initially. When an acid is added, the ammonia is protonated and the reaction is reversed. ammonium nitrate, nitrogen/nitrogen dioxide. The reaction is shown below:ĬuCl 2(aq) + 4 NH 3 (aq) –> 2+(aq) +2Cl. Thus the reaction between copper (II) and ammonia is a Lewis acid-base reaction that produces a colorful complex ion with four ammonia molecules surrounding the central copper ion. It has one lone pair of electrons to donate. Ammonia is a good example of a Lewis Base. Lewis acid/base reactions produce an acid-base adduct, with coordinate covalent bonds. The reaction is reversed.Ī Lewis acid is a substance that can accept a pair of electrons, while a Lewis Base can donate a pair of electrons. Add some ammonia to the copper chloride solution. Add copper chloride solution to the beaker.ġ. of water from the dilute sulphuric acid was prevented by a tube of calcium chloride. Copper chloride is located in the chemical storage cabinets.ġ. In the generator the aqueous ammonia solution, usually of about 30. ‡HCl and Ammonia are located in the cabinets under the hood. When acid is added, the reaction is reversed. Subjects: Acids/Bases, Lewis Acid-base reactions, complex ions, equilibrium, Le Chatlier’s principleĭescription: Ammonia is added to a solution containing copper chloride, producing the deep blue adduct.

Demonstrations › Acids, Bases, Buffers, Titrations › 16.5ġ6.5 Lewis Acid/Base reaction (Ammonia + Copper Chloride)

Dilute ammonia solution