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在容量分析中,酸碱滴定法是最常用的方法之一,任何一个试验室中,都缺不了它。但是,酸碱规定溶液的配制,一般是先配制成约略的浓度,然后再标定之。特别是碱溶液的配制,更加麻烦,为了消除固体氢氧化钠中的碳酸钠和配制过程中吸收的二氧化碳的影响,尚需用加有氯化钡的氢氧化钡溶液等方法进行处理。再则,这样配制得的溶液,不能达到我们所预期的浓度,例如恰好为0.05N 或0.1N 的规定液。假使
In capacity analysis, acid-base titration is one of the most commonly used methods, in any one laboratory, can not miss it. However, the preparation of acid-base provisions of the solution, usually formulated first approximate concentration, and then calibrated. Especially the preparation of alkaline solution is more troublesome. In order to eliminate the influence of sodium carbonate in solid sodium hydroxide and the carbon dioxide absorbed in the preparation process, it is required to treat with barium hydroxide-containing barium hydroxide solution and the like. Again, the solution so formulated failed to achieve the concentration we expected, for example exactly 0.05N or 0.1N of the prescribed solution. if