Answer: A
Explanation: the only way to turn it from blue to yellow is to mix it with an acidic solution.
Answer:
acidic solution or solution with high level of carbon dioxide.
Explanation:
When solution with increased acidity reacts with bromthymol blue indicator it turn its blue color into yellow.
this process is usually used in titration techniques in which neutralization reaction occur and indicator is used to check or observe the end point of the process that is the point at which neutralization reaction occur.
