CH3COONa已知浓度、电离平衡常数求pH,水解度

问题描述:

CH3COONa已知浓度、电离平衡常数求pH,水解度
CH3COONa浓度为0.1mol/L
CH3COOH电离平衡常数k为1.8*10^-5
求pH值,水解度

设:水解平衡时的[OH-]为y (mol/L)Ac- + H2O = HAc + OH-平衡时:c-y y yK = [HAc] × [OH-] ÷[Ac-]= ([HAc] × [OH-] × [H+] )÷ ([Ac-] × [H+]) = Kw ÷ Ka K= Kw ÷ Ka = 1.0*10^-14 ÷ 1.8*10^-5 = 5.56*10^-...