Chemistry - Salt Analysis Question with Solution | TestHub

${\mathrm{Fe}}^{3+}$ ion can be detected by ${\mathrm{K}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ $$\begin{array}{rl}4{\mathrm{Fe}}^{3+}+3{\mathrm{K}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]& \\ & ⟶{\mathrm{Fe}}_4{\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]}_3+12{\mathrm{K}}^{+}\end{array}$$