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Explain solubility of salt in presence of common ion. |
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Answer» Solution :The solubility of sparingly soluble SALT is decrease in presence of common ion. Common ion increase meanspositive ion or negative ion any one ions increase more in solution. e.g. In saturated solution of AgCl if NaCl is ADDED `Cl^(-1)` ion is common and if `AgNO_3` is added `Ag^+` ion is common so concentration of that ions increases. So precipitation take place and solubility of sparingly soluble salt decreases. eg.-1 : In saturated solution of NaCl is HCl gas is passed than concentration of `Cl^-` increases and solid NaCl increases so solubility of NaCl decreases. In the first example solid AgCl increases and solubilities of AgCl decreases. e.g.-2 : In the solution of sparingly soluble salt AgCl,when NaCl is added , the concentration of common ion `Cl^-` increases or by adding `AgNO_3`, concentration of `Ag^+` increases. Due to increase of `Cl^(-1)` or `Ag^+` , solid AgCl increases and solubility of AgCl decreases. |
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