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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.
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What would you need to do to determine whether bacteria growing on a petri plate from the brewer jar are anaerobes?
i. An anaerobic indicator. i. An anaerobic indicator. -anaerobic indicator, containing methylene blue, will turn white when oxygen is removed. if the bacteria grow while the anaerobic indicator is white then you know the bacteria is CAPABLE of anaerobic growth (growth in number, not size).
Does universal indicator turn milky when acid is added to a carbonate?
Yes, when acid is added to a carbonate, it reacts to produce carbon dioxide gas. This gas can create a milky appearance in universal indicator due to the production of tiny gas bubbles that scatter light.
What indicator in titration of sodium carbonate solution against hydrochloric acid would give a complete neutralization?
The indicator methyl orange can be used in the titration of sodium carbonate solution against hydrochloric acid to give a complete neutralization. At the endpoint, when all the carbonate ions have reacted to form bicarbonate ions, the solution will turn from yellow to pink.
What colour does litmus indicator turn when put in sodium hydrogen-carbonate?
When litmus indicator is put in sodium hydrogen-carbonate (a mild base), it turns blue. Sodium hydrogen-carbonate, also known as sodium bicarbonate, has a basic pH, which causes the blue color change in the litmus paper. In acidic solutions, litmus would turn red, but in this case, the basic nature of sodium hydrogen-carbonate results in a blue coloration.
Does hydrogen carbonate indicator shows any color with oxygen?
No, hydrogen carbonate indicator does not change color when exposed to oxygen. It is mainly used to detect the presence of carbon dioxide, as it turns pink in the presence of an acid (carbon dioxide dissolved in water forms carbonic acid).
What would you need to do to determine whether bacteria growing on a petri plate from the brewer jar are anaerobes?
i. An anaerobic indicator. i. An anaerobic indicator. -anaerobic indicator, containing methylene blue, will turn white when oxygen is removed. if the bacteria grow while the anaerobic indicator is white then you know the bacteria is CAPABLE of anaerobic growth (growth in number, not size).
What is the colour of hydrogen carbonate indicator?
The hydrogen carbonate indicator changes color from red in acidic conditions to yellow in neutral conditions to purple in basic conditions.
Color of sodium carbonate in universal indicator?
Sodium carbonate in universal indicator will typically appear blue or purple in color. This is due to the alkaline nature of sodium carbonate, indicating a high pH level.
What happens when carbon dioxide is bubbled into hydrogen carbonate indicator?
When carbon dioxide is bubbled into a hydrogen carbonate indicator, the indicator solution will turn yellow. This is due to the formation of carbonic acid, which is a weak acid. The carbon dioxide reacts with water in the indicator solution to form carbonic acid, causing the color change.
What indicator will be used in standardization of sulfuric acid against sodium carbonate?
In standardization of sulfuric acid against sodium carbonate, the indicator typically used is phenolphthalein. Phenolphthalein turns pink in basic solutions, which helps in determining the endpoint of the reaction between sulfuric acid and sodium carbonate.
What colour does universal indicator change to if carbonate acid is added?
Universal indicator changes to a color in the green/blue range when carbonate acid is added. This indicates a basic or alkaline pH level.
What colour does universal indicator change to if sodium sodium by carbonate is added?
Universal indicator changes to green when sodium bicarbonate is added.
What does a sodium hydrogen carbonate indicator do?
A sodium hydrogen carbonate indicator is used to test for the presence of acids. It turns pink in the presence of an acid and yellow in the presence of a base. This color change helps to determine whether a solution is acidic or basic.
What can be used as a protein indicator in foods for a science experiment?
Biuret
Does sodium carbonate react with phenolphthalein indicator?
Sodium carbonate does react with phenolphthalein indicator, producing a color change from colorless to pink in alkaline solutions. Sodium carbonate is a common base that can be used to test for the presence of acidity or alkalinity in a solution using phenolphthalein.
Does universal indicator turn milky when acid is added to a carbonate?
Yes, when acid is added to a carbonate, it reacts to produce carbon dioxide gas. This gas can create a milky appearance in universal indicator due to the production of tiny gas bubbles that scatter light.
What is the colour and pH of the aqueous solution of universal indicator at the beginning of the experiment?
Green
