1.   Given the following experimental data, calculate the molarity and the pKa of the acid analyte (HA) in the titration, if the balance neutralization reaction is

HA + NaOH à NaA + H2O.

     A pH reading of 3.65 was obtained when 13.0 mL of 0.413 M NaOH was added to the 25.0 mL analyte.

     The endpoint was achieved when 31.25 mL of NaOH had been added.

 

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