 If the mixture froth badly, a small piece of paraffin may be added to prevent it. The heat is then raised until the acid boils briskly. No further attention is required till the contents of the flask have become a clear liquid, which is colorless, or...  Bulletin - Bureau of Chemistry - Page 222by United States. Bureau of Chemistry - 1889Full view - About this book
 | Henry Carrington Bolton - 1881 - 174 pages
...point of the acid for from 5 to 15 minutes, or until frothing has ceased. The heat is then raised till the acid boils briskly. No further attention is required...till the contents of the flask have become a clear liqu1d, which is colorless or at least has only a very pale straw color. The flask is then removed... | |
 | 1887 - 636 pages
...the acid for from five to fifteen minutes, or until frothing has ceased. The heat is then raised till the acid boils briskly. No further attention is required till the contents of the flask has become a clear liquid, which is colourless, or at least has only a very pale straw colour. The... | |
 | 1889 - 688 pages
...fifteen minutes, or until frothing has ceased. If the mixture froths badly, a small piece of paraffin may be added to prevent it. The heat is then raised...acid boils briskly. No further attention is required until the contents of the flask have become a clear liquid, which is colourless, or at least has only... | |
 | Harvey Washington Wiley - 1895 - 350 pages
...fifteen minutes or until frothing has ceased. If the mixture froth badly, a small piece of paraffin may be added to prevent it. The heat is then raised...acid boils briskly. No further attention is required until the contents of the flask have become a clear liquid, which is colorless or at least has only... | |
 | Francis Sutton - 1896 - 612 pages
...about fifteen minutes, when about 10 grams of potassic sulphate are added, and the boiling continued. No further attention is required till the contents of the flask have become a clear liquid, which is colourless, or at least has only a very pale straw colour. The flask is then removed from the f rumc,... | |
 | Francis Sutton - 1896 - 612 pages
...fifteen minutes, when about 10 grams of potussic sulphate are added, and the boiling continued. Xo further attention is required till the contents of the flask have become a clear liquid, which is colourless, or at least has only a very pale straw colour. The flask is then removed from the frame,... | |
 | Guilford Lawson Spencer - 1897 - 512 pages
...boiling-point of the acid for from 5 to 15 minutes, or until frothing has ceased. If the mixture froth badly, a small piece of paraffine may be added to...have become a clear liquid, which is colorless, or at most has only a very pale straw color. The flask is then removed from the frame, held upright, and,... | |
 | Association of Official Agricultural Chemists (U.S.) - 1899 - 96 pages
...fifteen minutes, or until frothing has ceased. If the mixture froth badly, a small piece of paraffin may be added to prevent it. The heat is then raised...pale straw color. The flask is then removed from the flame, held upright, and, while still hot, potassium permanganate is dropped in carefully and in small... | |
 | 1899 - 688 pages
...to 15 minutes, or until frothing has ceased. If the mixture froths badly, a small piece of paraffin may be added to prevent it. The heat is then raised until the acid boils vigorously. No further attention is required until the contents of the flask have become a clear liquid,... | |
 | 1902 - 1004 pages
...to 15 minutes, or until frothing has ceased. If the mixture froths badly, a small piece of paraffin may be added to prevent it. The heat is then raised until the acid boils vigorously. No further attention is required until the contents of the flask have become a clear liquid,... | |
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