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Trichloroacetic acid, CCl3COOH, has an acid dissociation constant of 2.0 × 10-1 at 25 °C. Calculate...

Trichloroacetic acid, CCl3COOH, has an acid dissociation constant of 2.0 × 10-1 at 25 °C. Calculate the pH of a 0.0420 M trichloroacetic acid solution.

pH = _____

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