Question

What will happen when a red blood cells is placed in
(i) Pure water
(ii) Concentrated solution for some time.

Answer 1

i) Osmosis is defined as flow of solvent towards the highly concentrated solution through semi permeable membrane.Semi permeable membrane is a type of membrane which selectively allows flow of solvent through it like Red Blood Cell(RBC) has a membrane which is semi-permeable.

ii) When a Red Blood Cell is placed in concentrated saline solution exosmosis occurs and the RBCs shrink due to excess loss of water.