Determining the pH of an aqueous solution

Determine the pH of an aqueous solution prepared by mixing 50 mL of .125 M KOH with 50 mL of .125 M HCl while maintaining the temperature of the the system at 50 degrees C.

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...ee what we have in the solution.
K+, Cl-, H+, and OH-
Neither K+ or Cl- have an affect on pH so we have
Moles OH- = Molarity of KOH * Volume of KOH solution (IN LITRES)
and moles H+ =Molarity of HCl * ...