Question

When equal volume of the following solutions are mixed, which of the following gives maximum precipitate? ( $K_{s p}$ of $AgCl=10^{- 12}$ )

• A. $10^{- 4}MAg^{+}$ and $10^{- 4}MCl^{-}$
• B. $10^{- 3}MAg^{+}$ and $10^{- 3}MCl^{-}$
• C. $10^{- 5}MAg^{+}$ and $10^{- 5}MCl^{-}$
• D. $10^{- 6}MAg^{+}$ and $10^{- 6}MCl^{-}$

Answer 1

Answer: (B)

For precipitation the value of ionic product must be more than $K_{s p}$ so that a super saturated solution is possible and precipitation occurs at once.
Here $10^{- 3}MAg\times 10^{- 3}MCl^{-}>K_{s p}\left(\right.10^{- 12}\left.\right)$
i.e. precipitation occurs maximum in it.