Chemistry
Grade-10
Easy
Question
What color will Bromothymol change if acid is added?
- Red
- It does not change
- Yellow
- Blue
Hint:
Bromothymol blue (BMB) is an indicator dye that turns yellow in the presence of acid.
The correct answer is: Yellow
Bromothymol blue is a pH indicator. It is mostly used in applications that require measuring substances that would have a relatively neutral pH.
Bromothymol blue (BMB) is an indicator dye that turns yellow in the presence of acid. When carbon dioxide is added to the solution, it creates carbonic acid, lowering the pH of the solution. BMB is blue when the pH is greater than 7.6, green when the pH is between 6-7.6, and yellow when the pH is less than 6.
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