Chemistry - Salt Analysis Question with Solution | TestHub

Ppts. of ${\mathrm{Ag}}_2{\mathrm{CrO}}_4,{\mathrm{Ag}}_2{\mathrm{CO}}_3$ are soluble in ${\mathrm{NH}}_4\mathrm{OH}$ due to formation of ${\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}$

Green ppt. of $\mathrm{Ni}(\mathrm{OH}{)}_2$ is soluble in ${\mathrm{NH}}_4\mathrm{OH}$ due to formation of ${\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_6\right]}^{++}$ ${\mathrm{Ag}}_2{\mathrm{CrO}}_4\uparrow 4{\mathrm{NH}}_4\mathrm{OH}⟶2{\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}+{\mathrm{CrO}}_4{}^{--}+4{\mathrm{H}}_2\mathrm{O}$ ${\mathrm{Ag}}_2{\mathrm{CO}}_3\uparrow +4{\mathrm{NH}}_4\mathrm{OH}⟶2{\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}+{\mathrm{CO}}_3{}^{--}+4{\mathrm{H}}_2\mathrm{O}$ $\mathrm{Ni}(\mathrm{OH}{)}_2\uparrow +8{\mathrm{NH}}_4\mathrm{OH}⟶{\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_6\right]}^{++}+2{\mathrm{OH}}^{-}+6{\mathrm{H}}_2\mathrm{O}$

green ppt. soluble

$\mathrm{Fe}(\mathrm{OH}{)}_3$ is insoluble in ${\mathrm{NH}}_4\mathrm{OH}$

$\mathrm{Al}(\mathrm{OH}{)}_3$ is insoluble in ${\mathrm{NH}}_4\mathrm{OH}$