The volume (in mL ) of 0 . 1M AgNO _ 3 required for complete...

$\left(Cr{\left({H}_{2}O\right)}_{5}Cl\right){Cl}_{2} ⟶ \left(Cr{\left({H}_{2}O\right)}_{5}Cl\right) + 2{Cl}^{-}$

Number of ionisable ${Cl}^{-} in \left(Cr{\left({H}_{2}O\right)}_{5}Cl\right){Cl}_{2}$ is $2 .</p><p>Molarity of${Cl}^{–}$ions$= 0 . 01 \times 2 = 0 . 02M$</p><p>$∴$Millimoles of${Cl}^{–}$ions in the given solution</p><p>$= 20 \times 0 . 02$</p><p>$∴$Millimoles of${AgNO}_{3}$required$= 20 \times 0 . 2$</p><p>$V \times 0 . 1 = 20 \times 0 . 02$</p><p>$V = 4mL$</p></blockquote>$