Question

write an explanation for the effect of intensive exercise on the time it will take for the color of bromothymol blue to change

Explanation:

Intensive exercise increases respiration rate. More carbon - dioxide is exhaled. Bromothymol blue changes color in response to changes in pH caused by carbon - dioxide. Higher levels of exhaled carbon - dioxide will cause a faster color change in bromothymol blue as it reacts to lower the pH of the solution it is in.

Answer:

Intensive exercise increases the rate at which the color of bromothymol blue changes because it increases the amount of carbon - dioxide exhaled, which affects the pH and thus the color - change rate of bromothymol blue.