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5) Acetic acid (CH.CO2H) exists in the following equilibrium. CH3CO2H H+ + CH3CO2 a) The Ka for acetic acid is 1.75 X 106. What is

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5) Acetic acid (CH.CO2H) exists in the following equilibrium. CH3CO2H H+ + CH3CO2 a) The Ka for acetic acid is 1.75 X 106. What is the value of the pka of acetic acid? Show your work. b) What is the pH of a 125 mM solution of acetic acid? You may want to use the equilibrium expression. You may want to use the Henderson-Hasselbalch equation: pH = pka + log([A-][HA])

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