Anhydrous ferric chloride is prepared by:
dissoving Fe(OH)3 in concentrated HCl
dissolving Fe(OH)3 in dilute HCl
passing dry HCl overheated iron scrap
passing dry Cl2 gas overheated iron scrap
Composition of azurite mineral is
CuCO3.CuO
Cu(HCO3)2.Cu(OH)2
2CuCO3.Cu(OH)2
CuCO3.2Cu(OH)2
C.
2CuCO3.Cu(OH)2
Azurite is a copper carbonate hydroxide mineral with a chemical composition Cu(OH)2.2CuCO3. It is the ore of copper.
When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified as:
Zn
Fe
Pb
Hg
84Rn219 is a member of actinium series. The other member of this series is-
89Ac225
90Th232
15P35
92U235