QuestionAugust 18, 2025

Select the correct answer. A solution has a pOH of 8.20 What is the concentration of H_(3)O^+ A. 6.3times 10^-9 B. 1.6times 10^-6 C. 2.0times 10^-6 D. 10.2times 10^8

Select the correct answer. A solution has a pOH of 8.20 What is the concentration of H_(3)O^+ A. 6.3times 10^-9 B. 1.6times 10^-6 C. 2.0times 10^-6 D. 10.2times 10^8
Select the correct answer.
A solution has a pOH of 8.20 What is the concentration of
H_(3)O^+
A. 6.3times 10^-9
B. 1.6times 10^-6
C. 2.0times 10^-6
D. 10.2times 10^8

Solution
4.1(255 votes)

Answer

B. 1.6\times 10^{-6} Explanation 1. Calculate pH from pOH Use the formula **pH + pOH = 14**. So, pH = 14 - 8.20 = 5.80. 2. Calculate [H_{3}O^{+}] concentration Use the formula **[H_{3}O^{+}] = 10^{-pH}**. Therefore, [H_{3}O^{+}] = 10^{-5.80}. 3. Compute the value 10^{-5.80} \approx 1.6 \times 10^{-6}.

Explanation

1. Calculate pH from pOH<br /> Use the formula **pH + pOH = 14**. So, pH = 14 - 8.20 = 5.80.<br /><br />2. Calculate $[H_{3}O^{+}]$ concentration<br /> Use the formula **$[H_{3}O^{+}] = 10^{-pH}$**. Therefore, $[H_{3}O^{+}] = 10^{-5.80}$.<br /><br />3. Compute the value<br /> $10^{-5.80} \approx 1.6 \times 10^{-6}$.
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