Question

the ph indicator bromothymol blue turns yellow when co2 gas is added to a solution and blue when co2 is removed from a solution. which statement is a hypothesis you could test using a solution with bromothymol blue? a. if yeast cells give off o2, then the solution will turn from yellow to blue. b. if fish give off heat, then the solution will turn from blue to yellow. c. if water plants take in co2, then the solution will turn from yellow to blue. d. if algae give off o2, then the solution will turn from blue to yellow.

Answer 1

Answer;

C. if water plants take in co2, then the solution will turn from yellow to blue.

Explanation;

-Bromothymol blue is a pH indicator that is mostly used in applications that require measuring substances that would have a relatively neutral pH. A common use is for measuring the presence of carbonic acid in a liquid or dissolved carbon dioxide.

-The indicator 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.

-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.

Answer 2

c. if water plants take in co2, then the solution will turn from yellow to blue.