All Students Notes

  Co-ordination compounds Definition:  Those compounds which contain complex molecules or complex ion capable of independent existence are called coordination compounds.  Explanation: let us mix aqueous solution of two substances that are KCN and FeCN 2 . When this mixture is evaporated, a new compound is obtained. When this compound is dissolved in water it ionizes into potassium K + and [Fe(CN) 6 ] it was concluded that you compound was K 4 [Fe(CN) 6 ].   4KCN +  FeCN 2         --------->  K 4 [Fe(CN) 6 ]  K 4 [Fe(CN) 6 ]          ----------->  4K +  +     [Fe(CN) 6 ] 4- Parts of complex compound Complex compound is mostly made of two parts. 1. Positively charged ion or cation 2. Negatively charged ion or anion For example in K 4 [Fe(CN) 6 ], K +  is simple cation and [Fe(CN) 6 ] 4-   a is complex anion.        Complex ion  as ca...