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Calculate the pH of a 0.449 M aqueous solution of acetylsalicylic acid (aspirin) (HC9H7O4, Ka =...

Calculate the pH of a 0.449 M aqueous solution of acetylsalicylic acid (aspirin) (HC9H7O4, Ka = 3.0×10-4) and the equilibrium concentrations of the weak acid and its conjugate base.

pH =   
[HC9H7O4 ]equilibrium =    M
[C9H7O4- ]equilibrium =    M

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