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Science-Related Homework Help Chemistry Topic started by: fieldhockey on Apr 14, 2013



Title: What is the total molar concentration of ions in a 1.225 M solution of CH3OH?
Post by: fieldhockey on Apr 14, 2013
I know that the dissociation of CH3OH has something to do with finding the total molar concentration of ions but I still cant seem to figure out the correct answer. Help please!


Title: What is the total molar concentration of ions in a 1.225 M solution of CH3OH?
Post by: riots on Apr 14, 2013
The pKa of methanol is 15.5, meaning it will dissociate in water an order of magnitude less than water itself. Since the concentration of H+ and OH- in pure water is 1x10^-7 M each, there will be about 2x10^-7 M total ion concentration in pure water. The dissociation of methanol to H+ and CH3O- will be about a tenth of this, bringing the total ion concentration to 2.2x10^-7 M.