What is the hydronium ion concentration of an acid rain sample that has a pH of 3.35? A)2.2 × 10^-11 mol L^-1 B)4.5 × 10^-4 mol L^-1 C)3.35 mol L^-1 D)10.65 mol L^-1

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Quizplus · Accepted Answer

The pH of an aqueous solution is defined as the negative logarithm of the hydronium ion concentration. So, pH = -log[H3O+]. Rearranging this equation, we get [H3O+] = 10^-pH. Substituting the given pH of 3.35, we get [H3O+] = 4.5 × 10^-4 mol/L. The closest choice to this value is B: 4.5 × 10^-4 mol/L.

What Is the Hydronium Ion Concentration of an Acid Rain