Students are performing an experiment to understand the transfers of carbon between a photosynthetic organism, the aquatic plant Elodea, and a water snail. They are using test tubes that contain the same amount of water, partially enriched in CO₂, and the same amount of BTB, to detect the presence of CO₂. The test tubes are placed in natural sunlight for the duration of the experiment, as shown in the image. The contents of each test tube are as follows: Tube 1 Tube 2 Tube 3 Tube 4 Tube Tube 1 Tube 2 Tube 3 Tube 4 Contents Water + BTB Water+ BTB + 1 snail Water+ BTB + 1 Elodea Water+BTB + 1 Elodea + 1 snail What color should the contents of tubes 3 and 4 be at the end of the experiment? What is the reason for the colors that you predicted in Part A for tubes 3 and 4? Explain your response in terms of the processes responsible for the color changes and the organism(s) involved in each case. If tube 4 was placed in the dark for the duration of the experiment, predict the color of the contents of tube 4 at the end of the experiment. Explain your response.

Curren'S Math For Meds: Dosages & Sol
11th Edition
ISBN:9781305143531
Author:CURREN
Publisher:CURREN
Chapter9: Parenteral Medication Labels And Dosage Calculation
Section: Chapter Questions
Problem 4.1P
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What color should the contents of tubes 3 and 4 be at the end of the experiment? What is the reason for the colors that you predicted in Part A for tubes 3 and 4? Explain your response in terms of the processes responsible for the color changes and the organism(s) involved in each case. If tube 4 was placed in the dark for the duration of the experiment, predict the color of the contents of tube 4 at the end of the experiment. Explain your response.
Bromothymol blue (BTB) is a pH indicator that turns yellow in the presence of high levels of carbon dioxide (CO₂) in water. If BTB
yellow. If it has no CO₂, the solution with BTB will remain blue.
Possible colors of BTB depending of the amount of CO2 present:
Less CO₂
Color blue:
No CO₂, or very low
Color green:
Intermediate CO₂
More CO₂
Color yellow:
High CO₂
s added to a water solution that has high levels of CO₂ the solution will turn
Transcribed Image Text:Bromothymol blue (BTB) is a pH indicator that turns yellow in the presence of high levels of carbon dioxide (CO₂) in water. If BTB yellow. If it has no CO₂, the solution with BTB will remain blue. Possible colors of BTB depending of the amount of CO2 present: Less CO₂ Color blue: No CO₂, or very low Color green: Intermediate CO₂ More CO₂ Color yellow: High CO₂ s added to a water solution that has high levels of CO₂ the solution will turn
Students are performing an experiment to understand the transfers of carbon between a photosynthetic organism, the aquatic plant Elodea, and a water snail. They are using test tubes that contain the
same amount of water, partially enriched in CO₂, and the same amount of BTB, to detect the presence of CO₂. The test tubes are placed in natural sunlight for the duration of the experiment, as shown in the
image. The contents of each test tube are as follows:
Tube 1 Tube 2
Tube 3 Tube 4
Tube
Tube 1
Tube 2
Tube 3
Tube 4
Contents
Water + BTB
Water+ BTB + 1 snail
Water+ BTB + 1 Elodea
Water+ BTB + 1 Elodea + 1 snail
What color should the contents of tubes 3 and 4 be at the end of the experiment?
What is the reason for the colors that you predicted in Part A for tubes 3 and 4? Explain your response in terms of the processes responsible for the color changes and the organism(s) involved in each case.
If tube 4 was placed in the dark for the duration of the experiment, predict the color of the contents of tube 4 at the end of the experiment. Explain your response.
Transcribed Image Text:Students are performing an experiment to understand the transfers of carbon between a photosynthetic organism, the aquatic plant Elodea, and a water snail. They are using test tubes that contain the same amount of water, partially enriched in CO₂, and the same amount of BTB, to detect the presence of CO₂. The test tubes are placed in natural sunlight for the duration of the experiment, as shown in the image. The contents of each test tube are as follows: Tube 1 Tube 2 Tube 3 Tube 4 Tube Tube 1 Tube 2 Tube 3 Tube 4 Contents Water + BTB Water+ BTB + 1 snail Water+ BTB + 1 Elodea Water+ BTB + 1 Elodea + 1 snail What color should the contents of tubes 3 and 4 be at the end of the experiment? What is the reason for the colors that you predicted in Part A for tubes 3 and 4? Explain your response in terms of the processes responsible for the color changes and the organism(s) involved in each case. If tube 4 was placed in the dark for the duration of the experiment, predict the color of the contents of tube 4 at the end of the experiment. Explain your response.
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