A 100.0 mL sample of 0.18 mol L^-1 HClO₄ is titrated with 0.27 mol L^-1 NaOH. Determine the pH of the solution before the addition of any NaOH. A) 1.74 B) 1.05 C) 0.74 D) 0.57 E) 1.57

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Quizplus · Accepted Answer

Perchloric acid (HClO₄) is a strong acid and fully dissociates in solution. The concentration of H⁺ ions is equal to the concentration of HClO₄, which is 0.18 mol L⁻¹. The pH is calculated using the formula pH = -log[H⁺], so pH = -log(0.18) ≈ 0.74.

A 1000 ML Sample of 0