Propionic acid, HC3H5O2, has a Ką value of 1.3 x 105. A buffer solution is prepared by mixing 20.0 mL of 0.100 M HC3H5O2(aq) with 10.0 mL of 0.100 M NaC3H502(aq), its conjugate base. The pH of this buffer solution is measured to be 4.59. What is the concentration (in M) of the acidic component of this buffer solution. Express your answer to 3 significant figures, using the

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