摘要
介绍氯甲基膦酸的合成方法、纯品的制备和主要用途以及氯甲基膦酸的物理化学性质.重点是对该化合物的酸性进行了研究,利用电位滴定法绘出了滴定曲线.研究表明,氯甲基膦酸为二元酸,可以进行二级电离.在测定温度(27℃)下,其浓度平衡常数Kα_1和Kα_2分别为1.29×10^(-2)、6.82×10^(-7);活度平衡常数K’α_1和K’α_2分别为1.26×10^(-2)和6.51×10^(-7).
Synthesis, preparation, main uses, physical and chemical properties of Chloromethyl Phosphonic Acid
are deseribed. And it is emphasized on the study of the acidity of Chloromethyl Phosphonic Acid. The titra-
tion curve is obtained by means of potentioemtric titration. The result of the studies shows the Chloromethyl
Phosphonic Acid is a dibasic acid. It can be ionized by two stages. At 27℃, its concentration equilibrium con-
stants are:K_(a_1) 1.29×10^(-2), K_(a_2) 6.82×10^(-7); and its activity equilibrium constants are: K'_(a_1)1.26×10^(-2), K'_(a_2)
6.51×10^(-7). These data have not been published both national and international.
出处
《科技通报》
1993年第5期303-305,共3页
Bulletin of Science and Technology
关键词
氯甲基膦酸
电位滴定法
浓度
活度
chloromethyl phosphonic acid
potentiometric titration
activity equilibrium constant
concentration equilibrium constant
