Question

A solution is prepared by dissolving of pure HC2H3O2 and of NaC2H3O2 in of solution (the final volume).
(a)
What is the pH of the solution?
(b)
What would the pH of the solution be if of 0.250 M NaOH were added?
(c)
What would the pH be if of 0.40 M HCl were added to the original of buffer solution?

Answer 1

I've answered this before. Use the Henderson-Hasselbalch equation. You don't get anywhere by just recopying the problem; however, if you show what you're tried and/or tell us what you don't understand about the solution we should be able to help you thorough it.