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When used as a disinfectant a fresh bleach solution must be made?
Yes, a fresh bleach solution should be made each time it is needed as bleach loses its disinfectant properties over time when stored. Using a fresh solution ensures that it is effective at killing germs and bacteria.
Celery stalks that are immersed in fresh water for several hours become stiff and hard If left in a salt solution they become limp and soft From thsi you can deduce that thecells of the celery stalk?
The cells of the celery stalk are hypertonic to fresh water, causing water to move into the cells through osmosis, making them stiff. When placed in a salt solution, the cells become hypotonic, causing water to move out of the cells, resulting in a limp texture.
What is the expiration period for 10 percent bleach solution?
A 10 percent bleach solution typically remains effective for disinfection purposes for up to 24 hours. After this period, the solution may lose its potency and effectiveness in killing germs and bacteria. It is recommended to prepare fresh bleach solution daily for optimal disinfection.
What freezes faster sugar water or fresh water?
Sugar water freezes faster than fresh water due to the presence of sugar molecules which disrupt the formation of ice crystals. This phenomenon is known as the Mpemba effect, where the solution with a higher concentration of solute freezes faster than the solution with a lower concentration of solute.
What is the procedure of cryopreservation of bacterial culture?
The procedure of cryopreserving a bacterial culture involves mixing the culture with a cryoprotectant, such as glycerol, to prevent damage from freezing. The mixture is then aliquoted into cryovials and placed in a -80°C freezer or liquid nitrogen for long-term storage. Thawing of the culture involves quickly immersing the vial in a water bath at 37°C and transferring the culture to fresh growth media.
How are Nitrates and Nitrogen different?
Nitrates are the negative ions (NO3-) of nitrate salts in solution and Nitrogen is a diatomic elemental gas (N2), 79% in fresh air, insoluble in water.
What gas is used in packet foods to keep the contents fresh?
nitrogen that works as antioxidant and prevent rancidity
Is saltwater a solution or solute?
Saltwater is a solution because you can get fresh water and some salt and mix it and then you get saltwater.
When used as a disinfectant a fresh bleach solution must be made?
Yes, a fresh bleach solution should be made each time it is needed as bleach loses its disinfectant properties over time when stored. Using a fresh solution ensures that it is effective at killing germs and bacteria.
Why is nitrogen used in crisp packets?
Nitrogen is used in crisp packets due to its inert properties, which help maintain the freshness and crispiness of the chips. By replacing oxygen with nitrogen, the oxidation process that degrades the chips is slowed down, allowing them to stay fresh for longer periods.
Substances in fresh water in clouds?
There are not many substances in fresh water clouds. There is basically only oxygen, hydrogen, and trace amounts of carbon and nitrogen.
What is nitrogen used for for kids?
Nitrogen is used to make the air we breathe and to help plants grow. It is also used to make fertilizer for plants, and in some cases, to freeze food to keep it fresh.
What happens to a fresh water organism in 20 percent of saline solution?
it dies since it enters a hypotonic solution thus making it shrink
Celery stalks that are immersed in fresh water for several hours become stiff and hard Similar stalks left in a salt solution become limp and soft From this you can deduce that the cells of the celer?
hypertonic to fresh water but hypotonic to the salt solution
What does nitrogen do to ponds?
Nitrogen can enter ponds through runoff and can cause eutrophication, which leads to excessive algae growth. This can result in decreased oxygen levels in the water, harming fish and other aquatic organisms. Managing nitrogen input is important in maintaining healthy pond ecosystems.
How do astronauts get supply of fresh air over a long time?
They make their own oxygen by mixing nitrogen with carbon dioxide.
What elements are in fresh air?
Fresh air primarily consists of nitrogen (around 78%), oxygen (around 21%), and small amounts of other gases such as argon, carbon dioxide, and trace gases. It also contains water vapor, particles, and pollutants present in the environment.
