What are the characteristics of a pH indicator? A pH indicator __________ I.is usually a conjugate acid-base pair.
II) has different characteristic colors in protonated and unprotonated forms.
III) changes color when the pH is near its pKa.
A) I only
B) II only
C) both II and III
D) I,II,and III
E) I and III
Correct Answer:
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