Question

The solubility of $ AgCl $ will be minimum in which of the following?

• A. $ 0.01\text{ }M\text{ }NaCl $
• B. $ 0.01\text{ }M\,CaC{{l}_{2}} $
• C. pure water
• D. $ 0.001\text{ }M\text{ }AgN{{O}_{3}} $

Answer 1

Answer: (B)

$ CaC{{l}_{2}} \rightleftharpoons C{{a}^{2+}}+2C{{l}^{-}} $
The solubility of $ AgCl $ will minimum in 0.01 M $ CaC{{l}_{2}} $ solution due to the presence of excess $ C{{l}^{-}} $ ion (common-ion effect).