Equilibrium Question 215
Question: The precipitate of $ CaF_2 $
$ (K _{sp}=1.7\times {10^{-10}}) $ is obtained when equal volumes of the following are mixed [IIT 1992; UPSEAT 2000]
Options:
A) $ {10^{-4}}M,C{a^{2+}}+{10^{-4}}M,{F^{-}} $
B) $ {10^{-2}}M,C{a^{2+}}+{10^{-3}}M,{F^{-}} $
C) Both
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
When ionic product is greater than $ K _{sp} $ then precipitation occur $ K _{sp}<{10^{-2}}MC{a^{2+}}+{10^{-3}}M{F^{-}} $
