Calculate the equilibrium concentration of undissociated in a glycolic acid solution with an analytical glycolic acid concentration...

3.7 Ratings (423 Votes)

pH = 3.180

[H+] = 10^-pH

Â Â Â Â Â Â Â Â = 10^-3.108

Â Â Â Â Â Â Â Â Â = 6.61 x 10^-4 M = x

glycolic acidÂ Â Â =Â Â HA

HAÂ Â ------------------------> H+Â Â Â +Â Â A-

0.0824Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â ---------------------> initial

-xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +xÂ Â Â Â Â Â Â Â Â Â + x -------------------> change

0.0824 -xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â xÂ Â Â Â Â Â Â Â Â Â Â x ------------------> equilibrium

0.0824 -xÂ Â = equilibirum concentration

0.0824-6.61 x 10^-4 = 0.0817 M

equilibrium concentration of undissociated in a glycolic acid solutionÂ Â = 0.0817 M

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