問題詳情

9 一藥物含鹼性氨(pKa=9.0),在 pH 7.0 時其離子化百分比約為:
(A) 25%
(B) 50%
(C) 75%
(D)近於 100%

參考答案

答案:D
難度:簡單0.884956
統計:A(15),B(8),C(16),D(300),E(0)

用户評論

我愛阿,阿愛我】評論

If pKa - pH = 0.5, then the solution is 75% ionized/ 25% unionized or75% unionized/ 25% ionized If pKa - pH 1 then the solution is 99-100% ionized or 99-100% unionized*

Moon】評論

{10^(9-7)/[1+10^(9-7)]x100%}=99%

我愛阿摩,阿摩愛我】評論

If pKa - pH = 0.5, then the solution is 75% ionized/ 25% unionized or75% unionized/ 25% ionized If pKa - pH > 1 then the solution is 99-100% ionized or 99-100% unionized*

abcdefg】評論

因為是鹼性,所以pH=pKa+log[B]/[BH+]