Problem- Experimentally, acetate buffer HC2H3O2-C2H3O2^- can be prepared in different ways.

Part 1) Calculate the approximate pH of an acetate buffer solution prepared by mixing equal volumes of 0.10 M HC2H3O2 and 0.10 M NaC2H3O2 (Ka, HC2H3O2 = 1.8 x 10^-5).

Part 2) If an acetate buffer solution was going to be prepared by neutralizing HC2H3O2 with 0.10 M NaOH, what volume (in mL) of 0.10 M NaOH would need to be added to 10.0 mL of 0.10 M HC2H3O2 to prepare a solution with pH = 5.5 ?

Explain each and every step in detail. I need proficient help in the above problems.