A 50.0-mL sample of a 0.100 Af solution of a week acid HA has an equilibrium pH of 4.00. After to =
10-3mol of a substance X rs added to the solution. rt is observed that the pH of the solution
Increases What might be true about substance X7
X might be a strong base that partially neutralized some weak acid.
II. X might be a strong acid that made the solution more addle.
III. X might be a soluble ionic compound containing the anion A-