 | Samuel Hughes (C.E.) - 1880 - 490 páginas
...has been removed, a small quantity of the washings from the filter should be placed in a test tube, and a drop of a solution of silver nitrate added ;...nearly cold in a desiccator over strong sulphuric acid (to prevent absorption of moisture), and again weigh it. The difference between the first and second... | |
 | Thomas Newbigging - 1883 - 514 páginas
...continued until on repeating the test no cloudiness is produced.) Dry the filter with its r-ontents, and transfer it into a weighed platinum crucible....a desiccator over strong sulphuric acid, and again weigli it. The difference between the first and second weighings of the crucible will give the number... | |
 | Samuel Hughes (C.E.) - 1885 - 454 páginas
...drop of a solution of silver nitrate added ; should the liquid instead of remaining perfectly dear become cloudy, the washing must be continued until...nearly cold in a desiccator over strong sulphuric acid (to prevent absorption of moisture), and again weigh it. The difference between the first and second... | |
 | William Joseph Dibdin - 1889 - 256 páginas
...every trace of barium chloride and ammonium chloride has been removed, a small quantity of the waahings from the filter should be placed in a test-tube, and...crucible to cool ; place it when nearly cold in a dessicator over strong sulphuric acid, and again weigh it. The difference between the first and second... | |
 | Charles Edward Groves, William Thorp, William Joseph Dibdin - 1900 - 354 páginas
...its contents, drained but not dried, into the red-hot crucible. 148 MEASUREMENT AND ST011AGE OF GAS. to cool ; place it, when nearly cold, in a desiccator over strong sulphuric acid, and again weigh it when quite cold. The difference between the first and second weighings of the crucible will give the... | |
 | H. Joshua Phillips - 1894 - 426 páginas
...sulphate are then to be poured on to the filter, and the latter well washed with hot distilled water. (Ir. Order to ascertain whether every trace of barium chloride...grains of barium sulphate. Multiply this number by 1 1 and divide by 4 ; the result is the number of grains of sulphur in 100 cubic feet of the gas. This... | |
 | William John Atkinson Butterfield - 1896 - 410 páginas
...sufficient in quantity to leave an excess of acid in the solution, and then raised to the boiling-point. An excess of a solution of barium chloride is now...grains of barium sulphate. Multiply this number by 1 1 and divide by 4 ; the result is the number of grains of sulphur in 100 cubic feet of the gas. This... | |
 | John Hornby - 1900 - 336 páginas
...to cool, and when nearly cold, placed in a desiccator over strong sulphuric acid and weighed again. The difference between the first and second weighings...will give the number of grains of barium sulphate. This weight multiplied by eleven and divided by four will give the number of grains of sulphur in 100... | |
 | Charles Edward Groves, William Thorp, Thomas Richardson, Edmund Ronalds, Henry Watts, William Joseph Dibdin - 1900 - 386 páginas
...expeditious method is to drop the filler with its couteuU, drained but nut driud, into the red-hot cruc1ble. to cool ; place it, when nearly cold, in a desiccator over strong sulphuric acid, and again weigh it when quite cold. The difference between the first and second weighings of the crucible will give the... | |
 | Henry O'Connor - 1901 - 484 páginas
...expeditious method is to drop the filter with its contents, drained but not dried, into the redhot crucible.) When no black particles remain, allow the crucible...weighings of the crucible will give the number of the grains of barium sulphate. Multiply this number by 11 and divide by 4 ; the result is the number... | |
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... and a drop -of a solution of silver nitrate added ; should the liquid instead of remaining perfectly clear, become cloudy, the washing must be continued until, on repeating the test, no cloudiness is produced.) Dry the filter with its contents, and... 
