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 about indicato*tvp b y qd y:h)fxoiq94z;*h)rs are*r hvzqo(nh tvuz1970pb- / cr 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 t aqi*tvt7ooj 9n, sg4)heir conjugate base/a)7osi,nj go tatv 9*4qcid have different colours.
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