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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 48

[page]46[/page]

tions so that a test of the solutions was made. The iron solution was formed to be all right but the value of the aluminium solution was [?to?] high as used. (When the results were reduced to the new value they were good).
     As the reaction of the ferric oxide was not taken, the cause of the increased weight was not known to be due to [?alkalies?] present. Only in cases where the results for the ferric oxide were exceptionally high, were any traces of aluminium found.
     The chief source of error in the weight of the aluminium would be the silica dissolved from the filter flask. This however was counteracted by placing the hydrochloric acid in the flask and allowing the sodium aluminate filter into it. The dish was kept well covered during the operation and the opportunities for the solution to dry upon the side of the dish, or, to be affected by the carbon dioxide of the air were reduced to a minimum. Unless this precipitate of ferric hydrate (second one) is thoroughly washed, the

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[page]46[/page] tions so that a test of the solutions was made. The iron solution was formed to be all right but the value of the aluminium solution was [?to?] high as used. (When the results were reduced to the new value they were good). As the reaction of the ferric oxide was not taken, the cause of the increased weight was not known to be due to [?alkalies?] present. Only in cases where the results for the ferric oxide were exceptionally high, were any traces of aluminium found. The chief source of error in the weight of the aluminium would be the silica dissolved from the filter flask. This however was counteracted by placing the hydrochloric acid in the flask and allowing the sodium aluminate filter into it. The dish was kept well covered during the operation and the opportunities for the solution to dry upon the side of the dish, or, to be affected by the carbon dioxide of the air were reduced to a minimum. Unless this precipitate of ferric hydrate (second one) is thoroughly washed, the