What is isotonic solution in chemistry

Isotonische Medizin

¹ David S. Rowlands, Brigitte Hani Kopetschny, and Claire E. Badenhorst (2002) 'The Hydrating Effects of Hypertonic, Isotonic and Hypotonic Sports Drinks and Waters on Central Hydration During Continuous Exercise: A Systematic Meta-Analysis and Perspective", Sports Med, Band 52, Seiten 349-375.

Predrag Vujovic, Michael Chirillo, and Dee U. Silverthorn (2018) 'Learning (by) osmosis: an approach to teaching osmolarity and tonicity', Advances in Physiology Education. Volume 42, Issue 4, Seiten 626-635.

A.B. Lemmey, R.G. Eston, S.C. Moloney, and J.W. Yeomans (2000) 'Effects of hydration state and rehydration method on bioelectrical impedance analysis', South African Journal of Sports Medicine, Band 7, Ausgabe 1, Seiten 8-12.

⁵ Prixit Guleria, Parveen Chand, Amit Kaushik und Sapna Dhawan (2018) 'Role of nutrients and sports drinks on sports performance: A review', International Journal of Physiology, Nutrition and Physical Education, Volume 3, Issue 1, Seiten: 184-189.

⁷ Prixit Guleria, Parveen Chand, Amit Kaushik und Sapna Dhawan (2018) 'Role of nutrients and sports drinks on sports performance: A review', International Journal of Physiology, Nutrition and Physical Education, Volume 3, Issue 1, Seiten: 184-189.

What is an isotonic solution?

Isotonic is a solution that contains the same concentration of water and solutes, e.g. salt⁷. If the solute concentrations inside the cell and in the environment are the same, there is no net gain or loss of water from the cell.

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What is meant by isotonic?

The term isotonic or isotonic (Greek same tension or pressure) means: in the narrow medical sense, a solution that has the same osmotic pressure as human blood (7.5 bar), usually isotonic saline (0.9%).

Isotonic solution example

Which units one uses in this calculation then also determines the unit of mass concentration. It can also be given as a percentage. This is obtained, for example, by dividing the grams per liter (converted to kg) by 1 liter.

So if on the bottle there is a concentration indication of 4.9 percent by volume, it means we have 4.9 ml of pure alcohol in 100 ml of beer. In a bottle with half a liter of beer, there are 24.5 ml of pure alcohol. This content specification is called the volume concentration.

Hypotonic solution

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As you have already learned, osmosis occurs as a transport process of water between cells. Generally, there are three terms to describe the concentrations of substances separated by membranes: hypertonic, isotonic, and hypotonic.

The cell wall builds up a pressure during water influx - the tugor. It can be up to 7 bar in the cell (For comparison: this is three times more than in a car tire.). You can also call this "bulging" cell fully turgescent and the process deplasmolysis.