Question:
The acid dissociation constant for \( HC_6H_7O_6 \) is \( 8.0 \times 10^{-5} \). If a solution contains equal concentrations of \( HC_6H_7O_6 \) and \( C_6H_7O_6^- \), what will be the pH of the solution?
The acid dissociation constant for \( HC_6H_7O_6 \) is \( 8.0 \times 10^{-5} \). If a solution contains equal concentrations of \( HC_6H_7O_6 \) and \( C_6H_7O_6^- \), what will be the pH of the solution?
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For buffer solutions with equal concentrations of an acid and its conjugate base, the pH is the \(pK_a\) of the acid.
Updated On: Mar 30, 2025
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- 4.1
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The Correct Option is B
Solution and Explanation
Since the solution contains equal concentrations of the acid and its conjugate base, the pH is determined using the \(pK_a\) of the acid. The pH is given by the formula \(pH = \dfrac{pK_a}{2} = 4.1\).
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