Calculate the concentration (in M)of hydroxide ions in a solution at 25.0 °C with a pOH of 3.58. A)2.63 × 10¹⁰ B)3.80 × 10^-11 C)1.00 × 10^-7 D)3.80 × 10³ E)2.63 × 10^-4

Question

Quizplus · Accepted Answer

pOH = 3.58
pH + pOH = 14
pH = 14 - 3.58 = 10.42

pH = -log[H+]
10.42 = -log[H+]
[H+] = 10^(-10.42)

Kw = [H+][OH-]
10^(-14) = (10^(-10.42))[OH-]
[OH-] = 2.63 × 10^(-4) M

Therefore, the concentration of hydroxide ions is 2.63 × 10^(-4) M. The correct answer is E.

Calculate the Concentration (In M)of Hydroxide Ions in a Solution