15THE COMMON ION EFFECT ANDBUFFERSIt is important to consider an acid dissociation reaction (orbase reaction) in which a compound that contains one of theproductionsisaddedHAH++A−add H+or A−.By LeChatelier’s principle the reaction is shifted back towardsthe reactant.This shift in the equilibrium by LeChatelier’s principle is calledthecommon ion efect.Example:How does the equilibrium shift when 10 mL of 0.010M HCl is added to 25 mL of a 0.10 M niacin (HC6H4NO2)solution (Ka=1.4×10−5)?We
This is the end of the preview. Sign up
access the rest of the document.
This document was uploaded on 11/01/2011 for the course CHM 2046 at University of Florida.