NEET levelSingle correct optionDifficulty 1 of 3ia057
100mL of 2.0×10−5MAgNOX3 is mixed with 100mL of 2.0×10−5MNaCl. Given Ksp(AgCl)=1.8×10−10, what happens?
ANo precipitate, because Q=1.0×10−10<Ksp
BNo precipitate, because Q=4.0×10−10<Ksp
CPrecipitate forms, because Q=1.0×10−10>Ksp
DPrecipitate forms, because Q=4.0×10−10>Ksp
Answer: A
After mixing equal volumes each concentration is halved to 1.0×10−5M. The ionic product is Q=(1.0×10−5)2=1.0×10−10, which is less than 1.8×10−10, so no precipitate forms. Forgetting the dilution gives the wrong value 4.0×10−10.