Separation and Purification of Inorganic Compounds by Extraction

Separating a Mixture of Iron and Aluminium Salts. This experiment is a fire hazard Perform all operations in a fume cupboard, in the presence of your instructor ) Before separating the mixture, prepare a 36% aqueous solution of hydrochloric acid and an ether solution of this acid. 

Assemble an apparatus for the preparation of hydrogen chloride (see Fig. 53, p. 91). Pass a stream of hydrogen chloride into a bottle containing concentrated hydrochloric acid cooled to 0 °C (constantly cool the bottle with ice) until the density of the acid becomes 1.19 g/cm . 

To prepare an etber solution of hydrochloric acid, pour 150-200 ml of ether into a conical flask and cool the latter in a bath with dry ice. Without stopping the cooling, pass hydrogen chloride into the ether until there is no longer an odour of ether (about three hours). 

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