Chemistry Question

Consider Titration of 25 mL of .1 M CH3CO2H With .1 M NaOH. Calculate The pH After Adding The Following Volumes of NaOH: a. 0 mL b. 12.5 mL c. 20 mL d. 25 mL e. 37.5 mL I do know the correct answers, I just don't how to get to the answers. a. pH = 2.87 b. pH = 4.74 c. pH = 5.34 d. pH = 8.72 e. pOH = -log (0.0192 M) = 1.72  14 - 1.72 = 12.28 (I been having a hard time people getting the correct answer for part e, people keep getting 12.30 as the answer, but it is not. The correct answer is 12.28. I only remember how to do the last steps to get part e answer, which is 12.28, as it can be seen).

P5

5. Consider a titration between 25.0 mL of 0.100 M sodium hydroxide, NaOH and 0.050 M hydrochloric acid, HCI. a. Determine pH of the base before titration begins. b. Find pH of the solution in flask after 10.0 mL of acid has been added. c. Calculate the volume of acid added at the equivalence point. d. Show that the pH of solution in flask is 2.23 after 60.0 mL acid has been delivered. e. Sketch the titration curve for the titration above f. Name the type of titration. g. Identify the colour change of indicator at equivalence point if phenolphthalein is used.