What is the approximate pH of a solution X that gives the following responses with the indicators shown?

Name: What is the approximate pH of a solution X that gives the following responses with the indicators shown?
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Question

Quizplus · Accepted Answer

The indicator TB4939 transitions from yellow (pH < 4.8) to blue (pH > 6.0). Since solution X gives a response of yellow, the pH must be below 4.8. Therefore, choice B (pH 4.8-6.0) is the closest option, and it is the best choice.

What Is the Approximate PH of a Solution X That