Association

Name:
Association
Detailed information:
A reversible chemical combination due to any of the weaker classes of chemical bonding forces. Thus, the combination of two or more molecules due to hydrogen bonding, as in the union of water molecules with one another or of acetic acid molecules with water molecules, is called association; also, combination of water or solvent molecules with molecules of solute or with ions, i.e., hydrate formation or solvation. Formation of complex ions or chelates, as copper ion with ammonia or copper ion with 8-hydroxyquinoline is another example. Aqueous solutions of soaps or synthetic detergents are often called association colloids.