Chemistry - Salt Analysis Question with Solution | TestHub

$\begin{array}{ccccccc}{\text{FeCl}}_3& +& 3{\text{SCN}}_{\left(\text{aq}\right)}^{-}& \rightleftharpoons & \text{Fe}{\left(\text{SCN}\right)}_3& +& 3{\text{Cl}}^{-}\\ & & & & \text{Blood red}& & \end{array}$

$\begin{array}{ccccccc}4{\text{FeCl}}_3& +& 3{\text{K}}_4\left[\text{Fe}{\left(\text{CN}\right)}_6\right]& \to & 12\text{KCl}& +& {\text{Fe}}_4\left[\text{Fe}{\left(\text{CN}\right)}_6\right]\\ & & & & & & \text{Prussian blue}\end{array}$

$2{\text{FeCl}}_3+3{\text{H}}_2{\text{SO}}_4\to {\text{Fe}}_2{\left({\text{SO}}_4\right)}_3+6\text{HCl}$

${\text{K}}_2{\text{Cr}}_2{\text{O}}_7+2{\text{H}}_2{\text{SO}}_4\to 2{\text{KHSO}}_4+2{\text{CrO}}_3+{\text{H}}_2\text{O}$

$\begin{array}{ccccccc}{\text{CrO}}_3& +& 2\text{HCl}& \to & {\text{CrO}}_2{\text{Cl}}_2& +& {\text{H}}_2\text{O}\\ & & & & \text{Chromyl}& & \\ & & & & \text{chloride}& & \end{array}$

${\text{CrO}}_{\text{2}}{\text{Cl}}_{\text{2}}\text{+4NaOH}\to \underset{\text{Yellow}}{{\text{Na}}_{\text{2}}{\text{CrO}}_{\text{4}}}{\text{+2NaCl+2H}}_{\text{2}}\text{O}$

$\begin{array}{ccccccc}{\text{Na}}_2{\text{CrO}}_4& +& \text{Pb}{\left({\text{CH}}_3\text{COO}\right)}_2& \to & {\text{PbCrO}}_4& +& 2{\text{CH}}_3\text{COONa}\\ & & & & \text{Yellow ppt.}& & \end{array}$