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Calculate the ph at the equivalence

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Reference no: EM131703627

A Chemist titrates 100.0 mL of a 0.1485 M hypochlorous acid (HClO) solution with 0.1204 M KOH solution at 25° C. Calculate the pH at the equivalence. The pKa of hypochlorous acid is 7.50. 

Round the answer to 2 decimal places. 

Note for advanced students: you may assume the total volume of the solution equals to the initial plus the volume of KOH solution added. 

Calculating the exact pH is, as usual in titration problems, a solution stoichiometry (moles/molarity/volume) problem followed by an equilibrium composition problem.

  • First, you need to calculate the molarity of HCl 
  • after the titration reaction has run. This is the stoichiometry problem.
  • Then you can set up a reaction table and use the K
  • a equation for HCl to calculate the equilibrium molarity of  KOH +This is the equilibrium problem

Reference no: EM131703627

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