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Which of the following solutions would have the largest percent ionization? Assume that they 5) are...

Which of the following solutions would have the largest percent ionization? Assume that they 5) are all 0.10 M in acid at 25∘C. The acid is followed by its Ka value.

A) HNO2, 4.6 × 10^-4

B) HClO2, 1.1 × 10-2

C) HCHO2, 1.8 × 10^-4

D) HF, 3.5 × 10^-4

E) HCN, 4.9 × 10^-10

Corrent answr is B but WHY?

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