Data Analysis

Base on your titration curve, read the volume of NaOH  and pH at the equivalence point (the midpoint of the vertical section of the curve)

mLof NaOH at equivalence point: _______________________________

pH: ____________________________

Calculate the volume of at the half equivalence point (1/2 of the mL at equivalence point): _____________________________

Read the pH at the half equivalence point: ____________________________

For a weak acid, the value of pH at the half equivalence point equals pKa of the weak acid.

pKa of the weak acid is: __________________________

Identify the unknown acid with pKa  and molar mass using the following table.

The unknown acid is : ____________________________