1. initial pH, use HA <-->H+ + A- acid equilibrium and Ka value to calculate the concentration of H+ (0.0001M ethanoic acid without adding base) and then pH value.
2. mole equivalent OH- added means the number of moles of base added per mole of acid present in the solution. At 0.5 value, what is the relationship of [HA] and [A-]? When you get their relationship, you can find pH value in this region.
2. mole equivalent OH- added means the number of moles of base added per mole of acid present in the solution. At 0.5 value, what is the relationship of [HA] and [A-]? When you get their relationship, you can find pH value in this region.
(edited 2 years ago)
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