Which of the following statements is true about a solution made from 25.0 mL of 0.200 M CH3COOH and 25.0 mL 0.100 M Ba(OH)2 (aq). The pKa for…

Why it is not a buffer ? Thank you for your help!
Problem number 4
4. Which of the following statements is true about a solution made from 25.0 mL of 0.200M CH3COOH and 25.0 mL 0.100 M Ba(OH)2 (aq). The pKa for CH3COOH is 4.74.It is a buffer with a pH of 4.74.It is a buffer with a pH of 5.04.It is a buffer with a pH of 5.34.It is not a buffer.