AP BIOLOGY

Detailed explanation-1: -Water potential depends upon the solute concentration in a solution because increased solute concentration may result in decreased osmotic value and low water potential. Potassium nitrate is a crystalline salt and polar molecule, but sucrose is nonpolar and has higher osmolarity, resulting in lower water potential.

Detailed explanation-2: -The xylem channels of leaves have lowest water potential because they have very high solute concentration due to loss of water during transpiration.

Detailed explanation-3: -The solute potential of a 0.1 M solution of distilled water and sucrose at 20º C at standard atmospheric pressure is-0.23.

Detailed explanation-4: -So i is equal to 2 and sucrose is a non electrolyte. It won’t split into anything, so i is equal to 1. So even though they have the same concentration. 1 mole na cl has the higher osmotic pressure, so it’s going to be more hypertonic higher solute concentration of that solution.