 ... on ignition. If an excess of acetic acid has been used, this is cautiously removed by ammonia. Then a drop or two of solution of ammonium oxalate is added, and the small beaker is set aside for twelve hours if necessary. Almost invariably a small...  Bulletin - Seite 1031907Vollansicht - Über dieses Buch
 | 1901 - 392 Seiten
...hours if necessary. Almost invariably a small precipitate soon shows itself, which if fine-grained and non-adherent to the glass may be regarded as pure...re-precipitated. Its final weight, averaging perhaps one-half milligrm., is to be added to that of the lime already found, and subtracted as tricalcium phosphate... | |
 | 1898 - 356 Seiten
...re-solution and re-precipitation after ignition, and its weight, averaging one-half milligrm., is then added to that of the lime already found, and subtracted as tricalcium phosphate from that of the magnesium pyrophosphate, in order to arrive at the true figure for magnesium. This... | |
 | 1896 - 1020 Seiten
...re-solution and reprecipitation after ignition, and its weight, averaging one-half milligram, is then added to that of the lime already found, and subtracted as tricalcium phosphate from that of the magnesium pyrophosphate, in order to arrive at the true figure for magnesium. This... | |
 | Frank Wigglesworth Clarke, William Francis Hillebrand - 1897 - 342 Seiten
...re-solntiou and reprecipitation after ignition, and its weight, averaging one-half milligram, is then added to that of the lime already found, and subtracted as tricalcium phosphate from that of the magnesium pyrophosphate, in order to arrive at the true figure for magnesium. This... | |
 | Marcus Baker - 1900 - 350 Seiten
...twelve hours if necessary. Almost invariably a small precipitate soon shows itself, which if finegrained and nonadherent to the glass may be regarded as pure...already found, and subtracted as tricalcium phosphate from that of the magnesium pyrophosphate in order to arrive at the true figure for magnesia. This separation,... | |
 | Henry Gannett - 1906 - 644 Seiten
...quite insoluble in acids. This residue contains no silica, but only the constituents of a niagnesian phosphate, and it may be a peculiar metaphosphate....that of the magnesium pyrophosphate, in order « A pink color of varying intensity almost invariably becomes apparent as the mass approaches dryneaa,... | |
 | Geological Survey (U.S.) - 1907 - 220 Seiten
...alkalinity, and then acetic acid, drop by drop, till the solution, which should measure 10 to 30 cm.0 and not be hot, clears. It now and then happens that...the magnesium pyrophosphate, in order a A pink color of varying intensity almost invariably becomes apparent as the mass approaches dryness, a most delicate... | |
 | William Francis Hillebrand - 1907 - 212 Seiten
...alkalinity, and then acetic acid, drop by drop, till the solution, which should measure 10 to 30 cm.o and not be hot, clears. It now and then happens that...the magnesium pyrophosphate, in order a A pink color of varying intensity almost invariably becomes apparent as the mass approaches dryness, a most delicate... | |
 | Geological Survey (U.S.) - 1910 - 252 Seiten
...it may be filtered, ignited, and weighed as calcium oxide. Its weight, averaging less than 0.5 mg., is to be added to that of the lime already found and...from that of the magnesium pyrophosphate, in order to arrive at the true figure for magnesia. The alcoholic filtrate is to be evaporated, ignited to destroy... | |
 | Samuel Stinson Gannett, David Henry Baldwin - 1910 - 490 Seiten
...it may be filtered, ignited, and weighed as calcium oxide. Its weight, averaging less than 0.5 mg., is to be added to that of the lime already found and...from that of the magnesium pyrophosphate, in order to arrive at the true figure for magnesia. The alcoholic filtrate is to be evaporated, ignited to destroy... | |
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