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Procedure for titrating an acid against a standard solution of NaOH. The acid-base indicator, phenolphthalein, is colorless in acidic solution but takes on a pink color in basic solution. How would the volume of standard solution added change if that solution were Ba(OH)2(aq) instead of NaOH(aq)?

Respuesta :

Answer:

volume of [tex]Ba(OH)_{2}[/tex] solution required will be half the volume required for NaOH solution.

Explanation:

  • NaOH is a monoacidic strong base because it produces one [tex]OH^{-}[/tex] ion upon complete dissociation
  • [tex]Ba(OH)_{2}[/tex] is a diacidic strong base because it produces two [tex]OH^{-}[/tex] ions upon complete dissociation
  • So, one molecule of NaOH neutralizes one [tex]H^{+}[/tex] ion. But one molecule of [tex]Ba(OH)_{2}[/tex] neutralizes two [tex]H^{+}[/tex] ions.
  • Hence, for similar concentrations of NaOH and [tex]Ba(OH)_{2}[/tex], volume of [tex]Ba(OH)_{2}[/tex] solution required will be half of the volume required for NaOH solution.

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