Problem: The common-ion effect refers to the observation___________.A) that common ions precipitate all counter-ionsB) that some ions, such as Na+ (aq), frequently appear in solutions but do not participate in solubility equilibriaC) 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 solubilityD) common ions, such as Na+ (aq), don't affect equilibrium constantsE) ions such as K+ and Na+ are common ions, so that their values in equilibrium constant are always 1.00

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We're being asked to complete the following sentence:

The common-ion effect refers to the observation___________.


The common ion effect states that the solubility of a salt is lower in the presence of a common ion. This means if there is a higher concentration of a common ion present, the less soluble a compound will be. 

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Problem Details

The common-ion effect refers to the observation___________.

A) that common ions precipitate all counter-ions

B) that some ions, such as Na+ (aq), frequently appear in solutions but do not participate in solubility equilibria

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) common ions, such as Na+ (aq), don't affect equilibrium constants

E) ions such as Kand Naare common ions, so that their values in equilibrium constant are always 1.00

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