What color did the Bromothymol blue indicator turn when it was added to the test tube containing citric acid?
How accurate of an indicator is the Bromothymol blue?
This 0.1% aqueous bromothymol blue solution (also known as Bromthymol Blue) is a commonly used pH indicator. Bromthymol blue changes color over a pH range from 6.0 (yellow) to 7.6 (blue). It is a good indicator of dissolved carbon dioxide (CO2) and other weakly acidic solutions.
What is the color of the bromothymol blue indicator?
Why does Bromothymol blue change color when co2 is added?
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.
What Colour is thymol blue in neutral?
Thymol blue (thymolsulfonephthalein) is a brownish-green or reddish-brown crystalline powder that is used as a pH indicator. It is insoluble in water but soluble in alcohol and dilute alkali solutions….Thymol blue.
|Thymol blue (pH indicator)|
|below pH 8.0||above pH 9.6|
Why is Bromothymol blue green in neutral solutions?
It is bright aquamarine by itself, and greenish-blue in a neutral solution. The deprotonation of the neutral form results in a highly conjugated structure, accounting for the difference in color. An intermediate of the deprotonation mechanism is responsible for the greenish color in neutral solution.
What color would a Bromothymol blue solution be at pH 9?
The bromothymol blue will work between the pH ranges of 6.0-7.6. The colors will range from yellow to blue.
What is the chemical formula for Bromothymol blue?