Bromothymol Blue Ph Enumeration Lab Report

Carbon dioxide is a natural component of Earth’s atmosphere and has an important role in maintaining a livable life on the planet. All animals, including humans, make carbon dioxide when they breathe out. This experiment can be used to teach two things: it is an example of a chemical reaction and it shows how carbon dioxide builds up in water. Bromothymol blue is a chemical indicator that is used to find acids and bases. It is mostly used to show the pH of fish tanks and pools, measuring from 6.0 (yellow color) to 7.6 (green to blue). In the first experiment we exhaled into the solution. As the carbon dioxide from our breath absorbed into

When carbon dioxide reacts with water, carbonic acid is made. 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. Despite its name, bromothymol blue solution may sometimes appear yellow or reddish depending on the pH of the stock water used to prepare this pH indicator solution.Low levels of carbon dioxide or acid in solution with bromothymol blue indicator will appear blue. As the level of carbon dioxide or acid increases, the solution will gradually take on a yellow tint. This makes bromothymol blue ideal for biology experiments to indicate photosynthetic activity (solution turns blue as plants use up carbon dioxide) or respiratory activity (solution turns yellow as carbon dioxide content increases).Carbon dioxide is a byproduct of cellular respiration. Therefore, we can measure the amount of carbon dioxide as an indicator of cellular respiration. When carbon dioxide combines with water it forms carbonic acid. Bromthymol blue will be used to detect an increase in carbon dioxide