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lala2

HELPPPP! A student poured a solution of bromthymol 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. Bromthymol blue turns from blue to yellow in the presence of CO2. What is the purpose of the bromthymol blue in Figure 9-9? How can the student use this indicator to draw conclusions about the processes that the aquatic plants are carrying out? Explain your answer (3 points)

  • one year ago
  • one year ago

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  1. poopsiedoodle
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    try including figure 9-9

    • one year ago
  2. lala2
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    its just a picture of test tubes with plants nothing important

    • one year ago
  3. poopsiedoodle
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    what if people don't know what bromthymol blue is? ._.

    • one year ago
  4. lala2
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    The picture doesn't show it.. I dont know im stuck i think it has something to do with it being in the dark and not becoming co2

    • one year ago
  5. poopsiedoodle
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    I tell ya, I have absolutely no idea.

    • one year ago
  6. lala2
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    thanks for trying!

    • one year ago
  7. poopsiedoodle
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    :*

    • one year ago
  8. ValentinaT
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    I searched around a bit on Google, and found your exact question, with the answer: The purpose of the indicator is to detect the presence of carbon dioxide. The plants will give off oxygen and take in carbon dioxide when they are carrying out photosynthesis. They will give off carbon dioxide and take in oxygen when they are carrying out cellular respiration. If the plants produce more carbon dioxide in cellular respiration than they are able to use, the indicator will change from blue to yellow. If the plants produce and consume the same amount of carbon dioxide, no new carbon dioxide will be produced and the indicator will not change color.

    • one year ago
  9. lala2
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    Thanks sooo much!

    • one year ago
  10. ValentinaT
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    Your welcome!

    • one year ago
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