论文部分内容阅读
文献报道,强酸调强酸弱碱盐时,可依氢离子浓度平均值计算法推算其用量。笔者经过实验对照,认为采用此法不妥,现阐述如下。一、计算值与实验值不符我们以配制1%盐酸普鲁卡因溶液1000ml为例,采用文献报道的氢离子浓度平均值计算法推算调溶液不同pH时加入0.1N的盐酸量。然后依此量精密配制5份1%盐酸普鲁卡因溶
Reported in the literature, acid strong acid weak base salt, according to the average hydrogen ion concentration calculation method to calculate the amount. The author through experimental comparison, that this method is not properly used, are described below. First, the calculated value and the experimental value does not match We formulated 1% procaine hydrochloride solution 1000ml, for example, reported in the literature by calculating the average value of hydrogen ion concentration adjustment solution at different pH by adding 0.1N hydrochloric acid. Then according to the amount of precise preparation of 5 parts 1% procaine hydrochloride solution