BIOL 111 Chapter Notes - Chapter 3: Logarithmic Scale, Electronegativity, Heat Capacity
Document Summary
Because oxygen, hydrogen have very unequal electronegativities: oxygen, strongly electronegative. Becomes the negative pole: hydrogen, much more weakly electronegative. Can form hydrogen bonds with itself or other polar species. Properties of water owing to its hydrogen bonding behavior. The high specific heat of water means relatively little temperature change in response to a given input of energy. Water moderates temperature fluctuation both climatically (weather) and physiologically (evaporative cooling, etc. ) Solid water is less dense than liquid water because of the formation of the maximum number of hydrogen bonds among all water molecules. (cid:862)pure(cid:863) water dissociates into hydrogen ions (h+), and hydroxide ions (oh-), but only a little. Both ions are very reactive, and can affect the structure of organic molecules. Acids increase the concentration of hydrogen ions when added to a solution.
