Question

the acid dissociation constant for acetic acid is 1.85x10^-5. Calculate the pH at the equivalent point and the pH at one-half the equivalence point for the titration of 25.00 mL of 0.100 M acetic acid with 0.100 M NaOH? Its been a little while since ive done one of these problems. Can someone give step by step with explanation. Just need to see one worked out to get me started. Thanks