11. Solution to Chemistry Problem

3. The following volumes of 0.1 M sodium hydroxide solution were added to 100 ml of 0.1 M acetic acid solution: 99.5 ml, 100 ml and 100.5 ml. Calculate the pH of the solutions at the indicated points: K = 1.85 * 10-5. Which indicator should be used: phenolphthalein (pT = 9) or methyl orange (pT = 4)