Part 3) Determine the identity of a unknown solid
The standardized solution of NaOH was then used to determine the identity of
an unknown acid. 0.785 grams of the unknown monoprotic acid was titrated
using 23.55 ml of the sodium hydroxide solution. The graph below was
created.
HA()+OH(aq) H2O(1) + A'(aq)
E) How many moles of base were used?
F) How many moles of the unknown acid were used? (Hint: look at the
balanced equation to find the ratio)
G) What is the molar mass of the unknown acid?
H) What is the pKa of the unknown acid?
pH
Volume of titrant added (mL)
1) Based on your answers to G and H, what is the most likely identity of the unknown acid.
