DONNAN Meaning and
Definition
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Donnan is a term that refers to a phenomenon in physical chemistry and electrochemistry, named after the British chemist Frederick G. Donnan. It relates to the behavior of charged particles when they are separated by a semipermeable membrane that allows the selective passage of certain ions.
In this context, the Donnan effect explains the unequal distribution of charged particles, specifically ions, between two solutions separated by the semipermeable membrane. The presence of non-permeable charged molecules or ions on one side of the membrane causes an asymmetric pressure that prevents the ions from equally diffusing across the membrane. Consequently, an electric potential is established across the membrane due to the unequal distribution of the ions.
The Donnan potential, or also known as the Donnan potential difference, arises due to this charge imbalance across the membrane. It influences the behavior of ions and the osmotic pressure difference between the two solutions.
Moreover, the Donnan equilibrium refers to the state where the diffusion of ions is balanced by the Donnan potential difference and results in a specific concentration distribution. It is essential in understanding various physiological and chemical processes, such as ion transport in biological systems, solute distribution in cells, and dialysis techniques.
Overall, the Donnan effect, potential, and equilibrium are fundamental concepts in physical chemistry that help explain the behavior of charged particles when separated by a semipermeable membrane and have significant implications in various scientific and technological applications.
Common Misspellings for DONNAN
- dannon
- donon
- donan
- Donnem
- dannan
- Donam
- sonnan
- xonnan
- eonnan
- dknnan
- dlnnan
- dpnnan
- d0nnan
- d9nnan
- dobnan
- domnan
- dojnan
- dohnan
- donban
- donjan
Etymology of DONNAN
The word "Donnan" is a Scottish surname of Gaelic origin. It is derived from the given name "Donnán", which itself is composed of the elements "donn" meaning "brown" and the diminutive suffix "-án" indicating "little" or "small". In Scottish Gaelic, "donn" can also mean "dark" or "dusky". The name Donnán was traditionally associated with the Celtic god of the dead, Donn, and was later adopted as a personal name by various Scottish families. Over time, the name evolved into the surname "Donnan", which continues to be found among Scottish and Irish communities.
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