- 1 What does Bromothymol blue indicate?
- 2 What is Bromothymol blue and what is its purpose?
- 3 How do you make a BTB solution?
- 4 Why did we use Bromothymol blue in this experiment?
- 5 Is BTB toxic?
- 6 What caused the color change in Bromothymol blue?
- 7 What does it mean when Bromothymol blue turns green?
- 8 What color does phenolphthalein turn in a base?
- 9 What can we detect with BTB?
- 10 Is CO2 acidic or basic?
- 11 Is Bromothymol blue in water a solution?
- 12 What is the pH of Bromothymol blue?
- 13 What does pH stand for?
- 14 What does indicator mean?
What does Bromothymol blue indicate?
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 Bromothymol blue and what is its purpose?
Bromthymol Blue is a dye used as an indicator in determining pH. Bromthymol blue is a weak acid. It can be in acid or base form, depending on the pH of the solution. This reagent is yellow in acidic solutions, blue in basic solutions and green in neutral solution.
How do you make a BTB solution?
BTB can be prepared by mixing 0.1 g (a pinch) of bromothymol blue powder in 10 mL of a 4% solution of sodium hydroxide. Add 20 mL of alcohol and dilute to 1 L with distilled water. The solution should be deep blue. If it is green, add sodium hydroxide solution drop by drop until the solution turns blue.
Why did we use Bromothymol blue in this experiment?
Bromothymol Blue Uses The main uses of bromothymol blue are for testing pH and for testing photosynthesis and respiration. The changing level of carbon dioxide also changes the pH of the solution because carbon dioxide reacts with water to form carbonic acid, and carbonic acid decreases the pH of the solution.
Is BTB toxic?
Ingestion: May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed. Inhalation: May cause respiratory tract irritation. May be harmful if inhaled.
What caused the color change in Bromothymol blue?
What caused the bromothymol blue solution to change color? The bromothymol blue solution changed color because there was a chemical reaction with the carbon dioxide. After the exercising the bromothymol blue turned green faster. This is because the carbon dioxide was expelled into it faster, because of the exercising.
What does it mean when Bromothymol blue turns green?
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 color does phenolphthalein turn in a base?
Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.
What can we detect with BTB?
BTB stands for “ bromothymol blue.” In Carbon TIME we use BTB to detect CO2. When CO2 dissolves in water, it forms a weak acid (carbonic acid), which makes the pH of pure water as low as 5.5. In solutions with pH < 6.4 BTB is yellow.
Is CO2 acidic or basic?
Carbon dioxide, which is mildly acidic, is a waste product of the processing (metabolism) of oxygen and nutrients (which all cells need) and, as such, is constantly produced by cells. It then passes from the cells into the blood. The blood carries carbon dioxide to the lungs, where it is exhaled.
Is Bromothymol blue in water a solution?
Most recent answer It is a natural solution that gives you the answer to kbow the ph factor.
What is the pH of Bromothymol blue?
The presence of one moderate electron-withdrawing group (bromine atom) and two moderate donating groups (alkyl substituents) are responsible for bromothymol blue’s active indication range from a pH of 6.0 to 7.6.
What does pH stand for?
In chemistry, pH (/piːˈeɪtʃ/, denoting ‘potential of hydrogen’ or ‘power of hydrogen’) is a scale used to specify the acidity or basicity of an aqueous solution.
What does indicator mean?
An indicator is a measurement or value that gives you an idea of what something is like. vital economic indicators, such as inflation, growth and the trade gap. Synonyms: sign, mark, measure, guide More Synonyms of indicator.