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OpenStudy (anonymous):
A student poured a solution of bromothymol blue indicator into three test tubes. Then he placed an aquatic plant in two of the test tubes, as shown below. He placed a stopper on each test tube and placed them all in the dark for 24 hours. Bromothymol blue turns from blue to yellow in the presence of CO2. Predict what will happen to the test tubes in Figure 9–9 after 24 hours in the dark.
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