Find the percent ionization of a 0.200 mol L^-1 solution of formic acid. The K_a of formic acid is 1.8 × 10^-4. A) 3.0% B) 2.0% C) 1.0% D) 3.5% E) 4.6%

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Quizplus · Accepted Answer

Percent ionization is calculated using the formula: % ionization = ( [H⁺] / [HA] ) × 100. For formic acid, [H⁺] = √(K_a × [HA]) = √(1.8 × 10^-4 × 0.200) = 0.006. Thus, % ionization = (0.006 / 0.200) × 100 = 3.0%.

Find the Percent Ionization of a 0