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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 46

[page]44[/page]

basic nitrate it will not all be precipitated by the sodium sulphate, but will appear with the alumina. This is one of the chief source of errors but it may easily be avoided. Another source is the fineness of the precipitate. If it once runs through it is impossible to get a perfectly [?clean?] filtrate, no matter how much the solution is filtered. The results are as follows:--

[table of 3 columns]
[column 1]
[?]
Iron taken
Weight of crucible empty
" " " [ditto for Weight of crucible] + Ferric oxide + ash
Ferric oxide
Iron @ 70.01%
Amount in above
Percent found.
[?]
Aluminium taken
Wt. of crucible empty
" " " [ditto for Wt. of crucible] + aluminum
Aluminum
Aluminium @ 52.96%
Percent in above
Percent found
[column 2]
I.
[?0.1050?]
22.8862
[underlined]22.7317[/underlined]
0.1545
0.1081
0.1547
102.95
[?]
0.0888
24.3099
[underlined]24.1421[/underlined]
0.1678
0.0888
0.0888
100.00%
[column 3]
II.
0.1050
22.3254
[underlined]22.1637[/underlined]
0.1617
0.1131
0.1047
107.71%
[?]
0.0888
25.2684
[underlined]25.1050[/underlined]
0.1634
0.1865
0.0888
97.41%
[/table]

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[page]44[/page] basic nitrate it will not all be precipitated by the sodium sulphate, but will appear with the alumina. This is one of the chief source of errors but it may easily be avoided. Another source is the fineness of the precipitate. If it once runs through it is impossible to get a perfectly [?clean?] filtrate, no matter how much the solution is filtered. The results are as follows:-- [table of 3 columns] [column 1] [?] Iron taken Weight of crucible empty " " " [ditto for Weight of crucible] + Ferric oxide + ash Ferric oxide Iron @ 70.01% Amount in above Percent found. [?] Aluminium taken Wt. of crucible empty " " " [ditto for Wt. of crucible] + aluminum Aluminum Aluminium @ 52.96% Percent in above Percent found [column 2] I. [?0.1050?] 22.8862 [underlined]22.7317[/underlined] 0.1545 0.1081 0.1547 102.95 [?] 0.0888 24.3099 [underlined]24.1421[/underlined] 0.1678 0.0888 0.0888 100.00% [column 3] II. 0.1050 22.3254 [underlined]22.1637[/underlined] 0.1617 0.1131 0.1047 107.71% [?] 0.0888 25.2684 [underlined]25.1050[/underlined] 0.1634 0.1865 0.0888 97.41% [/table]