Bromothymol blue is an indicator that can be used to determine the effects photosynthesis and cellular respiration. As more CO2
is added, it turns yellow. When more O2 is added, it turns blue. A plant is placed in water while a student blows bubbles into the water with bromothymol blue. The water turns yellow. After 15 minutes, the water returns to a blue-ish color.
How more O2 added, causing the water turn back to blue?
Bromothymol blue is an indicator for weak acids and bases.It is used to observe photosynthetic acvtivities and for respiratory indication.
Blue Bromothymol indicator will turn to green then to yellow when CO2 is added.When O2 is added, no effect is noticed in the Blue Bromothymol because Oxygen doesnot affect the pH.
The word sponge is more appropriate to use than Underground river since an underground river can loose water while an aquifer cannot loose water, unless it is open-air and above ground. then the aquifer would slowly loose water due to evaporation from the sun.
