What is common ion effect
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Answers
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The common-ion effect states that in a chemical solution in which several species reversibly associate with each other by an equilibrium process, increasing the concentration of any one of its dissociated components by adding another chemical that also contains it will cause an increased amount of association.
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Answer:
Definition:
The lowering of the degree of ionization of a compound when another ionizable compound is added to a solution; the compound added has a common ion with the other compound.
Explanation:For example, silver chloride, AgCl, is a slightly soluble salt that in solution dissociates into the ions Ag+ and Cl−, the equilibrium state being represented by the equation AgClsolid ⇋Ag++Cl−. If another solute containing one of those ions is added, e.g., sodium chloride, NaCl, which supplies Cl− ions, the solubility equilibrium of the solution will be shifted to remove more Cl− from the solution, so that at the new equilibrium point there will be fewer Ag+ ions in solution and more AgCl precipitated out as a solid.