Which one of the following complexes will consume more equivalents of aqueous solution of AgNO 3 ?

Which one of the following complexes will consume more equivalents of aqueous solution of AgNO3 ?
  1. Na2CrCl5H2O
  2. Na3CrCl6
  3. CrH2O5ClCl2
  4. CrH2O6Cl3

Solution

The number of ions will be precipitated only which are out of coordination sphere in given complexes.

[Cr(H2O)6]Cl3(aq)       [Cr(H2O)6]3+(aq)  + 3Cl(aq)
3Ag+  +  3Cl  3AgCl  (White)

More Equivalents of AgNO3 aqueous solution will be consumed by more Cl- ions given by the complex

Cl-aq+AgNO3AgCl+NO3-aq

Asked in: JEE Main 2016 (09 Apr Online)

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