CH302H - Principles of Chemistry II: Honors
Spring 2016, Unique 49420

Lecture Summary, 10 March 2016

Buffers:  Many chemical systems need operate under a very narrow range of pH in order to function properly and carry out appropriate chemistry (i.e. life).  A buffer is a chemical system that regulates pH to keep it within a narrow range of values even with the addition of acid and/or base to the system.  A buffer is a combination of an acid and conjugate base pair that when dissolved in solution, maintains that solution at a constant pH.  Usually a buffer is made up of a relatively weak acid and conjugate base that are present in approximately equal amounts.  The pH of a buffered solution can be found using the Henderson-Hasselbalch equation.