Acid-Base and pH

A hydrogen bond is a special example of a dipole-dipole bond. 

The ability to form strong hydrogen bonds is responsible for the many unique characteristics of water, such as its very high melting point and boiling point for a molecule of its size. 

The three-dimensional structures of many important biomolecules, including proteins and nucleic acids, are stabilized by hydrogen bonds. 

The biochemical behavior of many important compounds depends on their acid—base properties. 

A biologically useful definition of an acid is a molecule that acts as a proton (hydrogen ion) donor. A base is similarly defined as a proton acceptor. How readily acids or bases lose or gain protons depends on the chemical nature of the compoimds imder consideration. The degree of dissociation of acids in water, for example, ranges from essentially complete dissociation for a strong acid to practically no dissociation for a very weak acid, and any intermediate value is possible. 

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Nakhleh, M. B., Krajeik, J. S. (1994). Influenee of levels of information as presented by different technologies on students understanding of acid, base, and pH concepts. Journal of Research in Science Teaching, J7(10), 1077-1096. 

Ionic Interactions Hydrogen Bonds van der Waals Forces THERMAL PROPERTIES OF WATER SOLVENT PROPERTIES OF WATER Hydrophilic Molecules Hydrophobic Molecules Amphipathic Molecules Osmotic Pressure IONIZATION OF WATER Acids, Bases, and pH... 

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