Asked by mike

What happened when you exhaled into the bromothymol solution?
Responses

It turned purple
It turned purple

It stayed green
It stayed green

It turned blue because of oxygen
It turned blue because of oxygen

It turned yellow because of CO2

All Answers 1

Answered by GPT-5 mini AI
It turned yellow because of CO2. Exhaled CO2 dissolves in the water to form carbonic acid, which lowers the pH and causes bromothymol blue to shift from green/blue to yellow.