Question

Which inorganic precipitate acts as a semipermeable membrane?

Answer 1

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A inorganic precipitate COPPER FERROCYANIDE often acts as a semipermeable membrane.
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Answer 2

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The semipermeable membranes used in the osmosis process can be an animal membrane, paper, etc. It should allow only the solvent particles and not the larger solute particles.
Traube, a German chemist, found that films of certain gelatinous precipitates, especially of cupric ferrocyanide, , and Calcium phosphate are perfectly semipermeable membrane.

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