Pure anhydrous `MgCl_(2)` can be prepared from the hydrated salt by

Anhydrous MgCl_(2) can be prepared by :

Anhydrous FeCl_(3) can be prepared-

Anhydrous AlCl_(3) cannot be prepared by heating hydrated salt. Why?

Pure nitrogen can be prepared from

Pure nitrogen can be prepared from

Anhydrous MgCl_(2) can be prepared by heating MgCl_(2)*6H_(2)O :

(a) Thionyl chloride can be synthesised by chlorinating SO_(2) using PCI_(5) . Thionyl chloride is used to prepare anhydrous ferric chloride startinh from its hexahydrated salt. Alternatively, from anhydrous ferric chloride can also be prepared from its hexahydrated salt by treating with 2,2-dimethoxypropane. Discuss all this using balanced chemical equations. (b) Reaction of phosphoric acid with Ca_(3)(PO_(4))_(2) yields a fertiliser "triple superphosphate" represent the same through balanced chemical equation.