Question
What is Donnan Equilibrium?
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Answer
- Donnan equilibrium is a process of passive absorption of minerals in plants which is without any expenditure of energy.
- It is assumed that certain anions after their entry by diffusion into the cell get fixed on inner side of cell membrane.
- Additional mobile cations are needed to balance this fixed anions as they cannot diffuse outside.
- Concentration of cations thus increases due to accumulation.
- This passive absorption of anions or cations from exterior against their concentration gradients so as to neutralize the effect of cations or anion is known as Donnan equilibrium.
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