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The Analytical Separation of Iron and Aluminium by Henry Erdmann Radasch, 1897

The Analytical Separation of Iron and Aluminium by Henry Erdmann Radasch, 1897, Page 47

[page]45[/page]

Sodium Hydrate Method[superscript](2)[/superscript]

     Add the solution, nearly neutralised with sodium carbonate, slowly and with constant stirring, to the nearly boiling solution of sodium hydrate. Filter and wash the precipitate with hot water and dissolve in dilute hydrochloric acid. Reprecipitate with ammonia and weigh as the oxide.
     To the filtrate add enough hydrochloric acid to dissolve the precipitate that forms and precipitate the [?aluminium?] with ammonia and weigh as the oxide.
     In this later work a standard solution was used and the value is expressed in terms of teh iron and aluminium present.
     In place of using caustic [?soda?iron?wash?such?] sodium peroxide was used. This can be obtained in a pure state more easily than the caustic soda. [?2.3??2-3?] grams in 100 cc of water was used for each separation. The hydrochloric acid was placed in the filter flask and the effects of the excess caustic soda was counteracted.
     The results that were obtained, at first, were above the theoretical value of the solu-

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[page]45[/page] Sodium Hydrate Method[superscript](2)[/superscript] Add the solution, nearly neutralised with sodium carbonate, slowly and with constant stirring, to the nearly boiling solution of sodium hydrate. Filter and wash the precipitate with hot water and dissolve in dilute hydrochloric acid. Reprecipitate with ammonia and weigh as the oxide. To the filtrate add enough hydrochloric acid to dissolve the precipitate that forms and precipitate the [?aluminium?] with ammonia and weigh as the oxide. In this later work a standard solution was used and the value is expressed in terms of teh iron and aluminium present. In place of using caustic [?soda?iron?wash?such?] sodium peroxide was used. This can be obtained in a pure state more easily than the caustic soda. [?2.3??2-3?] grams in 100 cc of water was used for each separation. The hydrochloric acid was placed in the filter flask and the effects of the excess caustic soda was counteracted. The results that were obtained, at first, were above the theoretical value of the solu-