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# HOOC COOH Maleic Acid Hd 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250

###### Question:

HOOC COOH Maleic Acid Hd 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250 mL of 100 mM maleic acid using 1 M NaOH. a) How many titratable protons are present in this acid? [1 marks). b) Indicate on the curve with a "O"the end point titrations of each titratable group. [1 mark) c) Indicate on the titration curve with a clear "X" each pKa value associated with these titratable protons and estimate to the nearest 0.5 unit the value for each pka. [3 marks]

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