Question

用0.1molL-1HCl标准溶液滴定20mL0.1molL-1NH3求化学计量点的PH?NH4的Ka=5.6X10^-

Answer 1

答：按照一元强酸滴定弱碱的化学计量点的计算通式：

[H+] = [CKa]^1/2 = [(0.1/2)X5.6X10^-10]^1/2 = 5.3x10^-6 mol/L

PH = 5.28