This phenomenon is known as the common ion effect. In this case, the presence of the common ion results in the decreased dissociation of a compound. To counterbalance that change, the equilibrium shifts to the left and causes production of acetic acid until the equilibrium is reestablished. When sodium acetate is added to an acetic acid solution, it increases the total concentration of acetate ions and disturbs the equilibrium. Both acetic acid and sodium acetate have the acetate ion in common. Acetic acid, a weak acid, partially dissociates in solution to produce hydronium and acetate ions, while its salt, sodium acetate, dissociates completely to produce sodium ions and acetate.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |