Question from: Mr. Laertes Russo | Last updated: January 6, 2022
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Equal volumes of different solutions but all having the same osmotic pressure contain the same number of solute particles at the same temperature. Two solutions having the same osmotic pressure are said to be isotonic and if no dissociation or association phenomena occur they have the same molarity.
What is meant by isotonic environment?
Meaning of Isotonic: isotonic is defined as a concentration of solutes equal to that of another solution. If two isotonic solutions are separated by a selective permeability membrane, there will be no water flow through that membrane.
When is a solution isotonic?
The isotonic is the compound of two solutions with the same concentration of solute, the hypertonic has a higher concentration of one solute than the other, the hypotonic one has a lower one.
When are two solutions isotonic?
Taking two solutions with different molar concentration (different number of particles dissolved in them), the solution with the lowest molar concentration is defined as hypotonic and the more concentrated one is hypertonic. Two solutions are instead isotonic (or equimolar) when they have the same concentration.
How to make a solution isotonic?
The solution can also be made isotonic with substances other than NaCl; in this case it is sufficient to divide the grams of salt obtained previously by the equivalents of the alternative substance (eg dextrose or boric acid); the grams of this substance necessary for the purpose are thus obtained.
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What are isotonic drinks?
What are isotonic drinks? Isotonic means “same pressure”. Isotonic drinks, also called electrolyte drinks, have the same pressure as our blood. This means that isotonic drinks have the same concentration of minerals contained in our blood.
What happens if I put a red blood cell in a hypertonic solution?
A human cell such as a red blood cell placed in a hypertonic solution tends to lose the water that is inside it and wrinkles. On the other hand, when two solutions have the same osmotic pressure then they are called isotonic.
When is one solution hypotonic compared to another?
When is a solution called hypotonic? If two solutions have different osmotic pressure, the one with a lower osmotic pressure is called hypotonic with respect to the other, which will be called hypertonic.
What is a hypotonic solution?
hypotonic, solution In chemistry, a solution that has a lower osmotic pressure than that of another solution to which it is compared.
What is the solvent and what is the solute?
In a solution, the substance that prevails in quantity is the solvent, while the other substances present in smaller quantities are the solutes. For example, in the above case of water and sugar, water is the solvent and sugar is the solute. The composition of the solutions is variable.
When does osmosis occur?
When solutions of different concentrations are found on two of the membranes, the solvent molecules move in the opposite direction to the osmotic pressure difference, from the lower concentration solution towards the higher concentration solution, until the concentrations become identical. …
What is the difference between physiological and hypertonic solution?
In practice, the difference consists in the different concentration of salts present in the liquid, compared to the concentration of salts naturally present in the cells of our organism and in human physiological liquids, which is 0.9%.
When a solution is isotonic with respect to the intracellular environment does it mean that it has a concentration of solutes?
The passage of water through the membrane depends on the type of environment (hypertonic, hypotonic or isotonic). – If the solution is isotonic with respect to the animal cell, there will be the same concentration of solute on both sides, creating a water balance.
How does water move in osmosis?
Water molecules travel through cell membranes spreading through the double layer of phospholipids thanks to aquaporins, proteins that facilitate the flow of water at very high speed into or out of cells.
Why can’t the plant cell burst?
In plant cells when water penetrates, the central vacuole fills and swells, however the presence of the cell wall prevents the cell from exploding and this causes pressure to be created on it by the aqueous content of the cell.
What is the name of the structure that holds two plant cells together?
Plasmodesmas are typical structures of plant cells. They are cytoplasmic channels in the cell wall that connect neighboring cells allowing communication and transport.
When is a solution called hypertonic?
– Hypertonic solutions: they have a concentration of salts higher than 0.9%, therefore a higher concentration than that of the cells that make up our body. This type of solution is recommended by the doctor for nasal washes, irrigations in case of colds and major infections.
What does hypertonic mean?
m. -ci) Comp. of hyper- and tonic]Solution i .: of two solutions, the one that has higher osmotic pressure (the other is hypotonic with respect to it); if the two solutions are brought into contact with each other by means of a semipermeable membrane, the solvent passes from the hypotonic solution to that i.
How is a hypertonic solution made?
2 level teaspoons of table salt dissolved in half a liter of water are enough. On the other hand, for the hypertonic solution (the one that sells at a high price on the market) it is sufficient to double the dose of salt, keeping the quantity of water unchanged. Therefore, 4 level teaspoons of table salt dissolved in half a liter of water.
Where does Plasmolysis occur?
plasmolysis Contraction of the cytoplasm and its consequent detachment from the cell wall in living plant cells, following the removal of water caused by a hypertonic solution (of sucrose, nitrates, etc.) in which a cell or tissue is found.
What happens if I put a cell in a hypertonic and a hypotonic solution?
if the solution is hypertonic with respect to the cell, the water will move towards the outside of the cell which can be damaged by dehydration; if the solution is hypotonic with respect to the cell, the water will move towards the interior of the cell which swells and can burst (cell lysis).
What happens to a red blood cell in distilled water?
osmotic pressure difference (the red blood cell in fact exchanges substances and liquids through the semipermeable membrane): if distilled water is brought into contact with the blood, a difference in osmotic pressure is generated, the water therefore tends to enter the red blood cell to restore the ‘osmotic balance …
What concentration should it have in order not to damage the red blood cells?
Hemoglobin (Hb) is a protein contained within red blood cells, specializing in the transport of oxygen to various parts of the body. In a healthy adult, its concentration should not drop beyond 12 g / dl.
What are isotonic drinks used for?
Preventing the body from dehydrating and providing energy that can be assimilated quickly: these are the primary functions of isotonic drinks, water-based solutions and other carefully dosed elements that allow you to replenish lost fluids, especially due to heat and activity sporty.
How do you prepare an isotonic drink?
In a plastic bottle pour 500 ml of water and two tablespoons of honey, taking care to dissolve it very well. Then squeeze the juice of a large orange (about 125 ml) and that of a lemon (60 ml). Pour them into the bottle and mix.
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