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Carbon dioxide is passed into a solution of bromthymol blue indicator until the acid solution turns yellow A sprig of elodea is placed into yellow solution and it turns blue purpose of experiment is?
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∙ 11y ago
carbon dioxide is used during photosynthesis
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∙ 11y ago
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When mixed with a drop of bromthymol blue what will cause the indicator to turn from blue to yellow?
Bromthymol Blue indicates Carbon dioxide is present. It is also a general acid-base indicator. When it turns green it is at the endpoint of the titration. When it turns yellow, it is overshot and thus acidic.
What is lime water an indicator for?
Limewater is an indicator for Carbon Dioxide
Why use ethanolic KOH?
ethanolic KOH can precipitate the impurities in solution
In a solution of carbon dioxide in water a soft drink the carbon dioxide is the solute?
The carbon dioxide is a solute in a solution of carbon dioxide in water in a soft drink.
What happens if you add phenol red to water and blow in it with a straw?
Just did this in my BIO 100 lab at SDSU so I know this answer... Background: Phenol red is a pH indicator which is yellow in acidic solutions and red in basic solutions. When you blow into the water with the phenol red, you are adding Carbon Dioxide into the solution. Carbon Dioxide would make this solution more acidic. Therefore this presence of Carbon Dioxide would change the solution color from red to a more orange - yellow color. Hope that helps!
Heating causes a bromthymol blue indicator solution to change yellow to blue rapidly why?
AnswerBromthymol blue is an indicator solution that turns yellow in the presence of carbonic acid (H2Co3). Chemically, water and carbon dioxide combine to form carbonic acid. Heating the solution favors the dissociation of carbonic acid back to carbon dioxide and water and therefore the bromthymol blue returns to its less acidic state and back to it original blue color.Answer$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
When mixed with a drop of bromthymol blue what will cause the indicator to turn from blue to yellow?
Bromthymol Blue indicates Carbon dioxide is present. It is also a general acid-base indicator. When it turns green it is at the endpoint of the titration. When it turns yellow, it is overshot and thus acidic.
How do you think bromothymol blue solution works?
Bromthymol Blue, when heated in a solution, indicates carbon dioxide. If there is carbon dioxide in the solution, it will turn bright yellow (when heated).
Sulfur dioxide and carbon dioxide dissolve in water what colour would their solution change the universal indicator to?
It wouldn't change at all as it is neutral
What is BTB solution used for?
BTB solution or bromothymol blue solution is an indicator for CO₂ turning a light green or yellow (extreme) depending on the amount of CO₂ indicated. As an student from a school that has recently done this experiment I can verify this information
What does a sodium hydrogen carbonate indicator do?
Sodium hydrogen carbonate is used as an indicator of pH or as a test for the concentration of carbon dioxide. For the preparation of the solution see the link below.
What are the colors of hydrogen carbonate indicator?
The hydrogen carbonate indicator is used to test for carbon dioxide. If it stays in the normal air, it remains red. If there is more than 0.03 percent of carbon dioxide in the air, it would turn yellow. It there is less than 0.03 percent of carbon dioxide it would turn purple.
What is lime water an indicator for?
Limewater is an indicator for Carbon Dioxide
What does photosynthesis have to do with the use of Bromothymol Blue?
Bromothymol Blue is commonly used as an indicator to detect the presence of carbon dioxide in a solution. In the context of photosynthesis, Bromothymol Blue can be used to observe the rate of photosynthesis. When photosynthesis occurs, carbon dioxide is consumed and oxygen is released. By adding Bromothymol Blue to a solution containing a photosynthetic organism, the color change of the indicator can indicate the rate of photosynthesis.
Why does adding carbon dioxide to BTB solution cause a color change?
BTB is an acid indicator. by adding carbon dioxide to the solution, it will turn into carbonic acid (a weak acid) turns green in low concentration and yellow in high concentration.
Why use ethanolic KOH?
ethanolic KOH can precipitate the impurities in solution
Why freshly prepared 'KOH' solution is taken in a watch-glass and kept in the bell jar during the experiment to show that carbon-dioxide is essential for photosynthesis?
It is because 'KOH' solution helps to absorb all the carbon dioxide present in the bell jar.
