3 Why does the titration curve of a weak acid begin at a hig

3. Why does the titration curve of a weak acid begin at a higher pH then a strong acid? 4. What information can be determined from the acid dissociation constant? 5. What is the Ka for acetic acid?

Solution

3:

Weak acid partially dissociated whereas strong acid completely dissociated. So, the hydronium ion concentration produced from weak acid is less than the hydronium ion concentration produced from strong acid.

Since pH = -log[H₃O⁺], weak acid has higher pH than strong acid.

Therefore, the titration curve of weak acid begin at higher pH then a strong acid.