Qualitative Chemical Analysis Organic And Inorganic
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Test the solution obtained, after dissolving in water and acidifying with hydrochloric acid, for a sulphate by means of barium chloride.
2. Ignite the substance with sodium, dissolve in a little water, filter, and place a drop or two of the solution on a watch glass, and add a drop of a solution of sodium nitro-pmsside ; if sulphur is present, a brilliant violet coloration will be produced, the sulphur having combined with the sodium to form sodium sulphide. The sulphide may also be tested for ...by acidifying with acetic acid, and adding a drop or two of a solution of a lead or silver salt, when a black precipitate will be produced.
Sulphur and Nitrogen. If sulphur and nitrogen occur together, sodium thiocyanate will be produced when the organic substance is ignited with sodium. Acidify a portion of the solution, obtained after ignition with sodium, with hydrochloric acid, and add ferric chloride. A blood-red coloration indi- cates the presence of sulphur and nitrogen in the original substance.
What to read after Qualitative Chemical Analysis Organic And Inorganic?
You can find similar books in the "Read Also" column, or choose other free books by Frederick Mollwo Perkin to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Test the solution obtained, after dissolving in water and acidifying with hydrochloric acid, for a sulphate by means of barium chloride.
2. Ignite the substance with sodium, dissolve in a little water, filter, and place a drop or two of the solution on a watch glass, and add a drop of a solution of sodium nitro-pmsside ; if sulphur is present, a brilliant violet coloration will be produced, the sulphur having combined with the sodium to form sodium sulphide. The sulphide may also be tested for ...by acidifying with acetic acid, and adding a drop or two of a solution of a lead or silver salt, when a black precipitate will be produced.
Sulphur and Nitrogen. If sulphur and nitrogen occur together, sodium thiocyanate will be produced when the organic substance is ignited with sodium. Acidify a portion of the solution, obtained after ignition with sodium, with hydrochloric acid, and add ferric chloride. A blood-red coloration indi- cates the presence of sulphur and nitrogen in the original substance.
What to read after Qualitative Chemical Analysis Organic And Inorganic?
You can find similar books in the "Read Also" column, or choose other free books by Frederick Mollwo Perkin to read onlineMoreLess
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