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How can you determine gasses present in solution using the expermints with BTB?
Bromothymol blue (BTB) can change color in the presence of carbon dioxide or acidic solutions, turning from blue to yellow. By observing the color change in a solution with BTB added, you can determine the presence of carbon dioxide or acidity levels, which can help identify certain gases like carbon dioxide in the solution.
How do you text for carbon dioxide?
To test for carbon dioxide, you can bubble the gas through limewater (calcium hydroxide solution). If carbon dioxide is present, it will cause the limewater to turn milky or cloudy due to the formation of calcium carbonate. Another method is using a pH indicator like bromothymol blue, which will change color in the presence of carbon dioxide.
What must be done to carbon dioxide gas to change it to solid?
the cold air can change the carbon dioxide gas to a solid
In the experiment of anaerobic respiration of yeast what happened to the lime water or hydrogen carbonate indicator solution in it?
In the experiment of anaerobic respiration of yeast, the yeast ferments sugars and produces carbon dioxide as a byproduct. When carbon dioxide is bubbled through lime water (calcium hydroxide solution), it reacts to form calcium carbonate, which causes the lime water to turn cloudy. If a hydrogen carbonate indicator solution is used, the increase in carbon dioxide leads to a color change, typically becoming more acidic and resulting in a shift in color depending on the pH change. This indicates the production of carbon dioxide during yeast fermentation.
What changes carbon dioxide gas back into carbon in a solid form?
the cold air can change the carbon dioxide gas to a solid
How does carbon dioxide change the acid-base condition of a solution when present in excess?
Excess carbon dioxide in solution reacts with water to form carbonic acid, lowering the pH of the solution. This reaction increases the concentration of hydrogen ions, making the solution more acidic.
Does carbon dioxide gas change acidified potassium dichromate solution green?
Yes, carbon dioxide gas will change acidified potassium dichromate solution from orange to green due to the reduction of the dichromate ion to chromium (III) ions in the presence of reducing agents like carbon dioxide.
Why does carbon dioxide change colors of indicator?
When carbon dioxide dissolves in water, it forms carbonic acid, which can change the pH of the solution. Indicators are substances that change color depending on the pH of the solution, so when the pH changes due to the presence of carbonic acid, the indicator may change color accordingly. This is how carbon dioxide can affect the color of an indicator.
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
How can you determine gasses present in solution using the expermints with BTB?
Bromothymol blue (BTB) can change color in the presence of carbon dioxide or acidic solutions, turning from blue to yellow. By observing the color change in a solution with BTB added, you can determine the presence of carbon dioxide or acidity levels, which can help identify certain gases like carbon dioxide in the solution.
Why does adding carbon dioxide to BTB solution cause a color change?
Adding carbon dioxide to bromothymol blue (BTB) solution causes a color change because it forms carbonic acid, which lowers the pH of the solution. BTB changes color in response to pH changes, shifting from blue in a basic solution to yellow in an acidic solution. The increased acidity due to the carbon dioxide causes the solution to turn yellow.
How does carbon dioxide change the acid-base condition when present in excess?
Carbon dioxide makes conditions more acidic. If moisture is present carbonic acid will form.
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?
The freshly prepared KOH solution is used in the experiment to absorb carbon dioxide present in the air inside the bell jar. By keeping the KOH solution in a watch-glass, any change in the color of the solution due to the absorption of carbon dioxide can be easily observed. This helps demonstrate that carbon dioxide is essential for photosynthesis by showing that the removal of carbon dioxide inhibits the process.
What would cause the blue btb solution containing elodea to turn green?
The blue BTB solution turning green in the presence of elodea indicates that photosynthesis is taking place. During photosynthesis, elodea utilizes carbon dioxide and water to produce glucose and oxygen, leading to a change in the color of the indicator solution from blue to green.
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?
The purpose of the experiment is to demonstrate the process of photosynthesis. When the elodea plant is added to the yellow solution (indicating acidity), it will consume carbon dioxide and release oxygen through photosynthesis. This will cause a color change in the solution from yellow to blue as the pH increases due to the removal of carbon dioxide.
Is freezing carbon dioxide a chemical change or physical change?
Frozen carbon dioxide is still carbon dioxide, so it is a physical change.
Is opening a soda can a chemical change?
Nope. The pressure keeps the Carbon Dioxide dissolved in the liquid, and when that pressure is relieved, the CO2 rapidly returns to its gaseous state. None of the molecules are reacting or changing, although the CO2 switches from aqueous to gaseous phase.
