Calculate the pH of a 6.7 * 10^-2 M NaOH solution. A) 12.83 B) 2.17 C) 11.82 D) 6.71 E) 1.17

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Quizplus · Accepted Answer

The pH of a solution is calculated using the formula pH = -log[H+], where [H+] is the concentration of hydrogen ions in the solution. For a NaOH solution, which is a strong base, the concentration of OH- ions is equal to the concentration of NaOH. The pOH can be calculated as pOH = -log[OH-], and since pH + pOH = 14 for aqueous solutions at 25°C, we can find the pH. Given a 6.7 x 10^-2 M NaOH solution, the pOH = -log(6.7 x 10^-2) = 1.17. Therefore, pH = 14 - 1.17 = 12.83.

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