BIO 361 Lecture Notes - Lecture 2: Solvent, Toluene, Titration
27 Jun 2016
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Biochemistry professor sanford simon stony brook summer 2016. Biochemical reactions take place in an aqueous environment. Biological molecules assume their shape and function in response to the physical and chemical properties of the surrounding water. Water is the medium for the majority of biochemical reactions. Water actively participates in many biochemical reactions particularly h+ and oh- Oxygen"s lone pairs are what causes the tetrahedral shape. A single water molecule can donate two hydrogens and accept two hydrogens. Hydrogen bond is a weak type of dipole-dipole interaction. Hydrogen bond networks in water are constantly switching. Networks of water molecules are constantly breaking and reforming every 2 x 10^-11 sec. Water has a boiling point of 100 degrees celsius, while methane has a boiling point of -164 degrees celsius. Hydrogen bonds are responsible for this considerably higher boiling point. Hydrophilicity is the tendency to dissolve in water. Hydrophobicity is the tendency not to dissolve in water.
