BIOL 1020 Lecture Notes - Lecture 5: Surface Tension, Hydrophile, Electronegativity

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18 Jan 2019
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BIOL 1020 Full Course Notes
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50-60% of our body is composed of water. All organism are composed of mostly water. Water covers about 75% of the earth. Electronegativity describes how electron greedy a molecule is. Water can form up to 4 hydrogen bonds due to its polar nature. This gives water many of its other life sustaining properties. Water is the principal solvent in living things. More things can dissolve in water than any other liquid. Due to water"s polarity and h bond formation, it can attract and dissolve many other types of molecules, especially other polar and ionic compounds. Hydration shell - when water molecules surround and bind with hydrogen bonds different solutes based on their charges and dissolving it. There are certain molecules that do not readily interact with water. Hydrophilic molecules - readily dissolve and interact with water. Hydrophobic - do not readily dissolve and interact with water. Amphipathic molecules contain both a hydrophobic and hydrophilic region.

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