The pka of citric acid is 3.09. What is the approximate citric acid: mono sodium citrate ratio in a 1.0 M citric acid solution with a pH of 4.0?
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a) Citric acid, C3H4OH(COOH)3 is a triprotic organic acid found in many plants. The pKa values for citric acid are: pKa1=3.15, pKa2=4.77, and pKa3=6.40. Calculate the pH of a buffer solution that contains 2.40 M sodium monohydrogen citrate and 1.80 M sodium citrate.
b) Write the neutralization reaction that occurs if NaOh is added to the buffer solution above.