CAS BI 107 Chapter Notes - Chapter 3: Aqueous Solution, Molecular Mass, Hydrogen Bond
Document Summary
Water only common substance that exist naturally in three physical states: organisms are made mostly of water. Concept 3. 1: polar covalent bonds in water molecules result in hydrogen bonding. Polar covalent bonds form between the hydrogen and oxygen in water: o is more electronegative than h, makes water a polar molecule, oxygen side has partial negative charge, hydrogen side has partial positive charge. Water molecules form hydrogen bonds with neighbours water = highly structured. Adhesion clinging of on substance to another: water"s adhesion to cell walls also help counter gravity when going up. Surface tension how hard it is to stretch or break the surface of a liquid: water has high surface tension. Thermal energy kinetic energy of the random movement of atoms/molecules. Temperature measure of energy, representing the average kinetic energy of molecules in a matter, regardless of volume.
