Chemistry

Problem

At 50 °C the ion-product constant of water is

K_w = 5.5 \times 10^{-14}

. The weak acid HQ has

pK_a = 9.30

(assumed temperature-independent). A

0.40\,\text{M}

aqueous solution of its conjugate base Q⁻ is prepared at 50 °C. What is the percent ionization of Q⁻ in this solution? a) 0.71 \% b) 3.3 \% c) 1.7 \% d) 0.017 \%

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