Answer to Question #307040 in Physical Chemistry for Mona

Physical Chemistry

Question #307040

Hydrofluoric acid has a Ka value of 7.2x10−4. What is the pH of a 0.04M solution of hydrofluoric acid

Expert's answer

HF (aq) + H₂O (l) ↔ H₃O⁺(aq) + F^- (aq)

ICE table:

x = 0.005 mol/L H₃O⁺

pH = - log (0.005) = 2.3

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