Question

Define Osmotic pressure.

Answer 1

The hydrostatic pressure which balances and prevents the osmotic inflow of water into concentrated solution is called osmotic pressure.

Answer 2

Osmotic pressure may be defined as the external pressure which should be applied to the solution in order to stop the phenomenon of osmosis, i.e., to stop the flow of solvent into the solution when the two are separated by a semipermeable membrane.