Properties of Water PDF

# Properties of Water ## Polar - Polar covalent bonds between oxygen and hydrogen in the water molecule - Hydrogen bonds between oxygen and hydrogen between water molecules ## Cohesion/Adhesion - **Cohesion:** Water molecules attracted to other WATER molecules - **Adhesion:** Water molecules att...

# Properties of Water ## Polar - Polar covalent bonds between oxygen and hydrogen in the water molecule - Hydrogen bonds between oxygen and hydrogen between water molecules ## Cohesion/Adhesion - **Cohesion:** Water molecules attracted to other WATER molecules - **Adhesion:** Water molecules attracted to other POLAR substances - Together leads to **Capillary Action** ## Universal Solvent - Partial negative oxygen binds with other polar molecules (partial positive end) and to positively charged ions (cations) - Partial positive hydrogen binds with other polar molecules (partial negative end) and to negatively charged ions (anions) ## Surface Tension - Cohesion develops a "surface" based on the interaction of hydrogen bonds - Allows you to skip rocks or water striders to walk on water ## Less Dense When Solid - Hydrogen bonds inhibit compaction - Ice floats; temperature buffer ## High Specific Heat - Water must absorb or release a large amount of energy to change 1 gram of water by 1°C. ## Evaporative Cooling - Release water on surface of organism to absorb heat energy from body (and break the bonds cooling down the organism). ## pH - pH = - log [H+] - As the concentration of hydronium/hydrogen ion increases, the pH decreases.