Question

define osmosis with an experiment

Answer 1

Osmosis is defined as the spontaneous flow of water into a solution, or, from a more dilute to a more concentrated solution when the two solutions are separated from each other by a semi-permeable membrane.
experiment-
In Fig. 2.4 below, the semipermeable mem­brane is fitted at the mouth of the thistle funnel. The thistle funnel is provided with a sucrose solu­tion up to a mark and inverted over water in a trough.

After some time it has been found that the level of sucrose solution is increased in the thistle funnel owing to the entry of water through the semi-permeable membrane.

The flow of water will be pre­vented when both the pressure (inside and outside) are equal. The excess pressure can be measured by a mercury manometer.

Answer 2

The moment of the movement of water molecules from higher concentration to low concentration through a semipermeable membrane is known as osmosis