- 搜标题
- 搜题干
- 搜选项
单项选择题
To prepare a buffer of pH 10.5, which buffer system listed below is the best?
To prepare a buffer of pH 10.5, which buffer system listed below is the best?
A、 CH3NH2·HCl —CH3NH2 (pKa =10.65)
B、NH3·H2O —NH4Cl (pKa =9.25)
C、Na3PO4 —Na2HPO4 (pKa3 = 12.32)
D、H2CO3—NaHCO3 (pKa1=6.37)
