Unformatted text preview: bonds, and heat is released when hydrogen bonds form. High heat of vaporization is another characteristic of hydrogen bonding, which must be broken before the molecules can exit from the liquid. Hydrogen bonding also explains why water is less dense as a solid than as a liquid. 10. Explain the function of buffers- what are they, and how do they work? Buffers are substances that minimize changes in concentrations of H+ and OH- in a solution. The presence of buffers aid biological fluids in resisting changes to their own pH when acids or bases are present. A buffer emits hydrogen ions from the solution when they are in excess and gives hydrogen ions to the solution when they have been used up....
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This note was uploaded on 09/27/2011 for the course BIOL 101 taught by Professor Fevzidaldal during the Fall '08 term at UPenn.
- Fall '08