Question

将0.5L 0.2mol/L Hcl 与0.5L 0.5mol/LNaAc混合,求PH

Answer 1

生成HAc:0.1mol/L;
生成NaAc:0.15mol/L;
pH=pKa+lg(c(共轭碱)/c(共轭酸))
=4.75+lg(0.15/0.1)
=4.93;