Water Notes

Water is a polar molecule. A water molecule is Polar because there is an uneven distribution of electrons between the oxygen and hydrogen atoms. The hydrogen end is positive and the hydrogen end is negative.

Cohesion- water molecules are attracted to other water molecules. This creates Surface Tension- this means water is able to resist rupturing when under pressure; creates a “film” on top of the water.

Hydrogen Bonds Water molecules adhere to each other using WEAK hydrogen bonds.

Adhesion- water molecules are attracted to different molecules

Adhesion and Cohesion Together create Capillary Action Capillary Action allows water to move against gravity from the roots of a plant to the leaves or flowers.

Water = Universal Solvent, dissolves ALMOST anything (Not lipids) Solutions are composed mostly of water ex) Salt Water Solute – The substance being dissolved. Ex) salt Solvent – The substance in which the solute dissolves. Ex) water