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Mix the watery environment of Elodea with a pH indicator called phenol red. In the presence...

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Chemistry

Mix the watery environment of Elodea with a pHindicator called phenol red. In the presence of an acid, phenol redwill appear yellow. In the presence of a strong base, phenol redwill appear purple. Intermediate colors correspond withintermediate pH values. Recall that plants use CO2 forphotosynthesis; the concentration of CO2 will determinethe pH of a solution. Plants also produce CO2 as abyproduct of cellular respiration.

  1. Will a solution with a high concentration of CO2 beacidic or basic? Why? (search on the internet)
  2. As Elodea uses CO2 during photosynthesis, will thesolution become more acidic or basic? If the solution is also mixedwith phenol red, what color should it become over time?
  3. Will the concentration of CO2 increase or decreasefor Elodea in darkness? What color will the phenol redindicator show over time?
  4. Which colors of visible light are used by chlorophyll forphotosynthesis? Which are not?
  5. Write a hypothesis for how the intensity of light would affectthe photosynthetic rate in Elodea.

Answer & Explanation Solved by verified expert
4.4 Ratings (971 Votes)
Will a solution with a high concentration of CO2 be acidic or basic Why Answer Acidic The increase of CO2 concentration in water will form carbonic acid in the solution resulting the solution acidic in nature The reaction follows CO2aq H2O H2CO3aq carbonic acid This H2CO3 formed easily dissociates into H ions causing the formtion of acidic solution H2CO3aq Haq HCO3aq HCO3aq Haq CO32aq All reactions    See Answer
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