DIY History | Transcribe | Scholarship at Iowa | Derivatives of Hydroxylamine by Agnes Elizabeth Otto, 1892 | Derivatives of Hydroxylamine by Agnes Elizabeth Otto, 1892, Page 22

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Derivatives of Hydroxylamine by Agnes Elizabeth Otto, 1892

Derivatives of Hydroxylamine by Agnes Elizabeth Otto, 1892, Page 22

[?page?]21[/?page?]

[stamped]362319[/stamped]

Weight of crucible -- 11.6926 gr.
Weight of Al[subscript]2[/subscript]O[subscript]3[/subscript] -- 0.1286 gr.
The percent of aluminium -- the weight of aluminium in Al[subscript]2[/subscript]O[subscript]3[/subscript] is 54.08/101.96 of 0.1286 gr. -- or 0.0682 gr. -- 0.0682/1.1989 = 5.769.
[underlined]5.769 % of aluminium[/underlined].
Average percent of I and II = 5.76 %.
Molecular weight of Al[subscript]2[/subscript](NH[subscript]4[/subscript]O)[subscript]2[/subscript](SO[subscript]4[/subscript])[subscript]4[/subscript] + 24H[subscript]2[/subscript]O = 936.34.
Theoretical percent of aluminium = [underlined]5.77 %[/underlined]

[underlined]Determination of Hydroxlamine[/underlined] -- A solution of the compound is mixed with Fehling solution in excess so as to precipitate all of the cuprous oxide. This reaction takes

[stamped]State University Of Iowa Library[/stamped]

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[?page?]21[/?page?] [stamped]362319[/stamped] Weight of crucible -- 11.6926 gr. Weight of Al[subscript]2[/subscript]O[subscript]3[/subscript] -- 0.1286 gr. The percent of aluminium -- the weight of aluminium in Al[subscript]2[/subscript]O[subscript]3[/subscript] is 54.08/101.96 of 0.1286 gr. -- or 0.0682 gr. -- 0.0682/1.1989 = 5.769. [underlined]5.769 % of aluminium[/underlined]. Average percent of I and II = 5.76 %. Molecular weight of Al[subscript]2[/subscript](NH[subscript]4[/subscript]O)[subscript]2[/subscript](SO[subscript]4[/subscript])[subscript]4[/subscript] + 24H[subscript]2[/subscript]O = 936.34. Theoretical percent of aluminium = [underlined]5.77 %[/underlined] [underlined]Determination of Hydroxlamine[/underlined] -- A solution of the compound is mixed with Fehling solution in excess so as to precipitate all of the cuprous oxide. This reaction takes [stamped]State University Of Iowa Library[/stamped]