Chemistry - Salt Analysis Question with Solution | TestHub

On addition of conc.$\mathrm{HCl}$. The equilibrium between two coloured Co (II) species can be described by equation

$\begin{array}{ccccccc}{\left[\text{Co}{\left({\text{H}}_2\text{O}\right)}_6\right]}_{\text{aq}}^{2+}& +& 4{\text{Cl}}_{\text{aq}}^{-}& \rightleftharpoons & {\left[{\text{CoCl}}_4\right]}_{\text{aq}}^{2-}& +& 6{\text{H}}_2\text{O}\left(\ell \right)\\ \left(\text{Pink}\right)& & & & \left(\text{Blue}\right)& & \end{array}$

The equilibrium is disturbed by changing the conc. of$\mathrm{C}{\mathrm{l}}^{-}$ions by addition of conc.$\mathrm{HCl}$in forward direction.