Which one of the following complexes will consume more equivalents of aqueous solution of AgNO3?AgNO3

# Which one of the following complexes will consume more equivalents of aqueous solution of $\mathrm{Ag}\left({\mathrm{NO}}_{3}\right)$?${\mathrm{AgNO}}^{3}$

1. A

${\mathrm{Na}}_{2}\left[{\mathrm{CrCl}}_{5}\left({\mathrm{H}}_{2}\mathrm{O}\right)\right]$

2. B

${\mathrm{Na}}_{3}\left[{\mathrm{CrCl}}_{6}\right]$

3. C

$\left[\mathrm{Cr}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{5}\mathrm{Cl}\right]{\mathrm{Cl}}_{2}$

4. D

$\left[\mathrm{Cr}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{6}\right]{\mathrm{Cl}}_{3}$

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### Solution:

The anion ${\mathrm{Cl}}^{-}$ outside the coordination sphere gets precipitated with ${\mathrm{AgNO}}_{3}$. In the choice d, there are three chloride ions and thus will consume more equivalents of aqueous solution of ${\mathrm{AgNO}}_{3}$.

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