Chemistry - Salt Analysis Question with Solution | TestHub

${\mathrm{Al}}^{3+}$and${\mathrm{Fe}}^{3+}$sulphides hydrolyse in water.${\mathrm{Ni}}^{2+}$and${\mathrm{Zn}}^{2+}$require basic medium with${\mathrm{H}}_2 \mathrm{S}$to form precipitate.${\mathrm{Ca}}^{2+}$and${\mathrm{Ba}}^{2+}$sulphides are also soluble.  only${\mathrm{Cu}}^{2+}$can form the precipitate with${\mathrm{H}}_2\mathrm{S}$in the acidic medium.