Quantitative Chemical Analysis, Volumen1

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J. & A. Churchill, 1876 - 524 páginas
 

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Página 444 - ... has redissolved and the fluid is decidedly acid. Allow it to stand at least for 24 hours in a warm place, take out a portion of the supernatant fluid with a pipette, mix it with more nitrite of potassa and observe whether a further precipitation takes place in this after long standing.

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