论文部分内容阅读
实验表明,冰醋酸在稀释过程中,测出的电流强度数值是由零逐渐增大,到一定值后又逐渐减小。这说明离子浓度由零逐渐增大,到一定浓度后又逐渐减小。有的同志解释离子浓度减小的原因,认为是由溶液极稀造成的,我认为这种说法欠妥当。溶液中离子浓度最大时,醋酸浓度并非极稀,而是较浓。现将推论过程介绍如下:1.在稀溶液中,根据α=K/C~(1/2),求出不同浓度醋酸的电离度数值,并与实验值相比较:(见附表一)可以看出,计算值与实验值基本相符。
Experiments show that during the dilution process of glacial acetic acid, the measured current intensity value gradually increases from zero to a certain value and then gradually decreases. This shows that the ion concentration gradually increases from zero, and gradually decreases after a certain concentration. Some comrades explained the reason for the decrease in ion concentration and thought that it was caused by a very thin solution. I don’t think this statement is appropriate. When the concentration of ions in the solution is maximum, the concentration of acetic acid is not extremely lean but rather concentrated. The inference process is described as follows: 1. In the dilute solution, according to α = K/C ~ (1/2), calculate the ionization degree values of different concentrations of acetic acid, and compare with the experimental values: (see the attached table) It can be seen that the calculated values are basically in agreement with the experimental values.