A Result of the Common-Ion Effect Is ________

Multiple Choice

A result of the common-ion effect is ________.

A) that some ions, such as Na⁺ (aq) , frequently appear in solutions but do not participate in solubility equilibria
B) that common ions, such as Na⁺ (aq) , don't affect equilibrium constants
C) that the selective precipitation of a metal ion, such as Ag⁺, is promoted by the addition of an appropriate counterion (X^-) that produces a compound (AgX) with a very low solubility
D) that ions such as K⁺ and Na⁺ are common ions, so that their values in equilibrium constant expressions are always 1.00
E) that common ions precipitate all counter-ions