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 upi ,76udur v0indicators arr+a*9ytm zi3gf9bexz 019p4j jsg 8cm e 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 base(ld k:i+ 2i79q3cw hds7a xjkf5hz;yms where the components of their conjugate base/acid have 5+dmd ah73k: ( jfczq7w2ixhy9l; iskdifferent colours.
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