H+: 0.05*0.02 = 0.001
OH-: 0.05 * 0.03 = 0.0015
0.0015-0.001 = 0.0005 mol
0.0005 mol / 0.05L =10^-2 [OH-]
10^-14 / 10^-2 = 10^-12 [H+]
所以 PH值 = 12
49. 0.05 N的HCl 20 mL與0.05 N的NaOH 30 mL混合..-阿摩線上測驗