What Is the PH at the Half-Stoichiometric Point for the Titration

question 12

Multiple Choice

What is the pH at the half-stoichiometric point for the titration of 0.22 M HNO₂(aq) with 0.10 M KOH(aq) ? For HNO₂,K_a = 4.3 * 10^-4.

• A) 2.31
• B) 7.00
• C) 2.01
• D) 3.37
• E) 2.16