How did the indicator of barium hydroxide appear in the absence of carbon dioxide by yeast cell
To understand how the indicator of barium hydroxide appeared in the absence of carbon dioxide by yeast cells, we need to break down the process step by step.
1. Indicator: Barium hydroxide is a chemical compound commonly used as a test for carbon dioxide in the laboratory. It behaves as an indicator by reacting with carbon dioxide to form a white precipitate of barium carbonate. This reaction is often used to identify if carbon dioxide is present in a substance.
2. Yeast cell metabolic process: Yeast cells are capable of performing a process called fermentation (anaerobic respiration) in the absence of oxygen. During fermentation, the yeast cells break down glucose (a sugar) into ethanol (alcohol) and carbon dioxide through a series of enzymatic reactions.
3. Absence of carbon dioxide: In the absence of carbon dioxide, it means that the yeast cells are not producing carbon dioxide as a byproduct of fermentation. This could be due to various reasons, such as insufficient glucose, lack of proper temperature or pH conditions, or the absence of yeast cells themselves.
4. Indicator reaction: When carbon dioxide is absent, barium hydroxide indicator will not react with anything, and therefore, there will be no visible change in the indicator solution. The absence of a white precipitate formation indicates the absence of carbon dioxide.
In summary, if the indicator of barium hydroxide does not turn white in the presence of yeast cells, it suggests that the yeast cells are not producing carbon dioxide through fermentation, potentially due to certain factors impacting their metabolic processes or growth conditions.