Posted by dylan on Saturday, March 3, 2012 at 8:39pm.
A buffer is
a. a weak acid mixed with a salt of the weak acid. (example: acetic acid and sodium acetate)
b. a weak base mixed with a salt of the weak base. (example: NH3 + NH4Cl)
c. a combination of salts/acids OR salts/bases that produce either a or b above. (examples: HCl + excess sodium acetate OR NaOH + excess NH4Cl)
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