Given the following list of ka values, determine which weak acid solution would have the highest concentration of [h+] (lowest ph value) at equilibrium assuming all acids have the same initial concentration.
a. hf(aq), ka = 6.3 × 10^−4
b. hc7h5o2(aq), ka = 6.4 × 10^−5
c. hn3(aq), ka = 1.9 × 10^−5
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