MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibriumSalt Hydrolysis

Some chemists at ISRO wished to prepare a saturated solution  of  a  silver  compound  and  they  wanted  it  to have  the  highest  concentration  of  silver  ion  possible. Which of the following compounds, would they use? sp K AgCl 1.8 10 , x sp K AgBr 5.0 10 x sp K Ag CrO 2.4 10 x

A.AgCl
B.AgBr
C.Ag2CrO4✓ Correct
D.None of these
Explanation

For binary salts (like AgCl, AgBr) sp s K Solubility of AgCl = 30 1.8 10 x 5 1.34 10 mol / L x Solubility of AgBr = 23 5.0 10 x 7 7.1 10 mol / L x For Ag2CrO4, Ksp = 4s3  Solubility of Ag2CrO4 12 sp 3 15 3 3 5 K 2.4 10 600 10 4 4 8.44 10 mol / L x x x As  Ag2CrO4  bas  maximum  solubility,  it  will  give maximum  Ag+  ions  in  solubility.  Hence,  it  will  be used.

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