管): 5.0 mL
Conical Flask（锥形烧瓶）: 250 mL
Reagents Needed试剂要求
0.1 mol/L HCl
Phenolphthalein Indicator Solution（酚酞指示剂）: Phenolphthalein 0.1g, Dl water 30 mL, and Ethanol 70 mL酚酞0.1g, Dl水30 mL，乙醇70 mL。
Procedure过程
1.Pipet 5mL of sample into the conical flask.用移液管取 5mL样品放入锥形瓶中。
2. Add 100 to 150mL of Dl water. 加入100至150mL Dl水。
3.Add 5 to 10 drops of Phenolphthalein indicator solution. 加入5 - 10滴酚酞指示剂溶液。
4.Titrate with 0.1 mol/L HCl from