Molarity and the pH Value of Acid or Alkali

  1. The table below shows the pH value and the molarity of a strong acid and a weak acid.
    Molarity of Acis
    pH value
    Hydrochloric acid
    Ethanoic Acid
    0.1 mol dm-3
    1.0
    2.9
    0.01 mol dm-3
    2.0
    3.4
    0.001 mol dm-3
    3.0
    3.9
    0.0001 mol dm-3
    4.0
    4.4
    0.00001 mol dm-3
    5.0
    4.9
  2. The table below shows the pH value and the molarity of a strong alkali and a weak alkali.
    Molarity of alkali
    pH value
    Sodium hydroxide solution
    Ammonia aqueus
    0.1 mol dm-3
    13.0
    11.1
    0.01 mol dm-3
    12.0
    10.6
    0.001 mol dm-3
    11.0
    10.1
    0.0001 mol dm-3
    10.0
    9.6
    0.00001 mol dm-3
    9.0
    9.1
  3. According to the tables shown above, we can conclude that the pH value of acid or alkali is affected by 2 factors:
    1. The Molarity
    2. Strong or weak acid(Alkali)

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