Bromocresol green is yellow in its acidic form and blue in its basic form. When is it green?

Question

Quizplus · Accepted Answer

Bromocresol green changes color in the pH range around its pKa value, which is when it is in its transition state between the acidic (yellow) and basic (blue) forms, appearing green. This is not necessarily at pH 7 or specifically at the equivalence or midpoint of a titration unless those points coincidentally match its pKa.

Bromocresol Green Is Yellow in Its Acidic Form and Blue