 | 1899 - 688 trang
...the oxalic acid, which is decomposed in the presence of excess of alkali with evolution of hydrogen: In this way, the ammonia still filling the tube is...sulphuric acid present is titrated with normal sodium hydrate, according to the method described in Art. 9O, Quantitative Analysis, Part 1. The process should... | |
 | 1902 - 1022 trang
...the oxalic acid, which is decomposed in the presence of excess of alkali with evolution of hydrogen: In this way, the ammonia still filling the tube is...sulphuric acid present is titrated with normal sodium hydrate, according to the method described in Art. 9O, Quantitative Analysis, Part 1. 129. KJeldahrs... | |
 | 1902 - 1004 trang
...acid, which is decomposed in the presence of excess of alkali with evolution of hydrogen : FIG. »l. In this way, the ammonia still filling the tube is driven out i nto the acid in the bulbs. The bulbs are then disconnected and the contents transferred to a beaker,... | |
 | 1906 - 458 trang
...below redness break off the closed tip and aspirate air slowly through the apparatus for 3 minutes. In this way, the ammonia still filling the tube is...sulphuric acid present is titrated with normal sodium hydrate, according to the method previously described. The attention of the student is called to the... | |
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In this way, the ammonia still filling the tube is driven out into the acid in the bulbs. The bulbs are then disconnected and the contents transferred to a beaker, the bulbs being thoroughly rinsed out with water. The excess of sulphuric acid present... 