A.6 B.5 C.7 D.8 E.9
A.2 B.3 C.4 D.5 E.6
A.90%解離時(shí)的pH B.99%解離時(shí)的pH C.50%解離時(shí)的pH D.10%解離時(shí)的pH E.全部解離時(shí)的pH