level: Level 1 of COMPLEXATION
Questions and Answers List
level questions: Level 1 of COMPLEXATION
| Question | Answer |
|---|---|
| • Are formed when transition metal compounds are present in a solution | Complex Ions |
| • A complex ion is a central metal ion surrounded by | LIGANDS • Ex. Cobalt surrounded by water |
| • It is the product of a Lewis acid-base reaction in which neutral molecules or ions (called ligands) bond to a central metal atom by coordinate covalent bonds | Coordination complex |
| • Are molecules or ions with a lone pair of electrons, that attach themselves to ions with high positive charge density | Ligands |
| ligand of Al3+ | H2O |
| ligand of Cu2+ | NH3 |
| ligand of Zn2+ | CN- |
| ligand of Cr3+ | OH- |
| • Common characteristics: active lone pairs of electrons in the outer energy level • Used to form co-ordinate bonds with the metal ion | Simple Ligands Ex. • Water, ammonia, and chloride ions |
| Ligands act as __ and the central metal they bond is __ | Lewis bases, Lewis acids |