本题目来源于试卷: Mechanisms of Chemical Change F.1 Proton Transfer Reactions，类别为 IB化学
[单选题]
What statements abouts:vgzkgq pu3z+ ,*m4u indicatovt. aobew m//t nj.o yxw,:e+6rs are correct?
|.Indicators are typically weak acids or weak bases
||.Indicators are different colours in acidic and alkaline conditions
|||.The midpoint of the colour change of an indicator occurs when [$HIn$] = [$In^-$]
A. I and II only
B. I and III only
C. II and III only
D. I, II, and III
参考答案: D
本题详细解析:
Indicators are weak acids or bases where the components of their conjugao;tm gesiqh2v r)5twwk z1 8+*te base/acid have diffe85+ hsvr1ttwmz ki;2 qgo)w *erent colours.
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