If the pH of a certain soft drink is 3.60, what is the H₃O⁺ concentration in the soft drink? A)3.6 M B)2.5 × 10^-3 M C)2.5 × 10^-5 M D)2.5 × 10^-4 M E)10. M

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Quizplus · Accepted Answer

The pH is related to the concentration of hydrogen ions [H+] by the equation pH = -log[H+]. Rearranging this equation gives [H+] = 10^-pH. Plugging in the pH of 3.60 gives [H+] = 2.5 × 10^-4 M. Since the concentration of [H+] is equal to the concentration of [HSO4-] in the soft drink (assuming the acid in the soft drink is H2SO4), the answer is D, 2.5 × 10^-4 M.

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