AP BIOLOGY

Detailed explanation-1: -How come a raisin placed in a cup of pure water overnight will puff up with water, in terms of osmosis? to swell, as osmosis continues to take place and water moves out of the raisin.

Detailed explanation-2: -A phenomenon called endosmosis takes place when raisins are placed in water for few hours. When raisins are soaked in water, they swell. All this is due to the process of osmosis. The water molecules pass the cell membrane of the raisins and the raisins thus get swollen.

Detailed explanation-3: -Also sometimes referred to as kishmish water, raisin water is a beverage made by soaking raisins overnight, then straining and heating the liquid. This drink is purported to enhance digestion, flush out toxins, and supply a variety of important nutrients and antioxidants.

Detailed explanation-4: -When raisins are placed in water (a hypotonic solution), they absorb water by a process called osmosis and swell up. Osmosis is the net movement of solvent molecules from a region of their higher concentration to a region of their lower concentration through a semipermeable membrane.

Detailed explanation-5: -The process that takes place during formation of raisins from grapes is osmosis.