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Answer:

pOH = 7.89

Explanation:

As HCl is a strong acid, [H⁺] is equal to the original acid concentration. In other words:

  • [H⁺] = 7.68x10⁻⁷ M

Knowing [H⁺], we calculate the pH of the solution:

  • pH = -log[H⁺]
  • pH = 6.11

With the pH, we can calculate the pOH of the solution, using the following formula:

  • pOH = 14 - pH
  • pOH = 7.89

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