The molar solubility of AgCI in 6.5 times 10^-3 M AgNO_3 is 2.5 times 10^-8 M. I

Question

The molar solubility of AgCI in 6.5 times 10^-3 M AgNO_3 is 2.5 times 10^-8 M. In deriving K_sp from these data, which of the following assumptions are reasonable? (a) K_sp is the same as solubility. (b) K_sp of AgCI is the same in 6.5 times 10^-3 M AgNO_3 as in pure water. (c) Solubility of AgCl is independent of the concentration of AgNO_3 (d) [Ag^+] in does not change significantly upon the addition AgCl to 6.5 times 10^-3 M AgNO_3. (e) [Ag^+] in solution after the addition of AgC1 to 6.5 times 10^-3 M AgNO_3 is the same as it would be in pure water.

Explanation / Answer

Since, Ksp is the same as solubility.

Ksp of AgCl is the same in 6.5 x 10-3 M AgNO3 as in pure water.

And hence, solubility of AgCl is independent of the conc of AgNO3.

Hence answer is (c).

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