posted by billy .
a. A 0.1 molal solution of a weak monoprotic acid was found to depress the freezing point of water 0.1930C. Determine the Ka of the acid. You can assume 0.1 molal and 0.1 molar are equivalent.
b. 100 ml of a 0.1M solution of the above acid is titrated with 0.1 M NaOH. After an amount of NaOH is added the pH= 5.2. How much NaOH was added?
( c ) The titration is continued to equivalence. What is the pH at equivalence?
See my earlier post for the solution to a.
b is calculated from the Henderson-Hasselbalch e4quation.
c is calculated from the hydrolysis of the salt.
Show your work if you need additional help.