1. 100mL 0.5M H2SO4及100mL 1.0M NaOH
2. 100mL 1.0M CH3COOH及100mL 1.0M NaOH
3. 100mL 1.0M CH3COOH及100mL 1.0M NH3(aq)
4. 100mL 1.0M HCl及100mL 1.0M KOH
更新1:
這一題的答案是3. 100mL 1.0M CH3COOH及100mL 1.0M NH3(aq)