A 0.1 m solution of hf is 8% dissociated thn ka for hf is
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HF(aq) <=> H+(aq) + F-(aq)
Percent ionization = ([H+]/[HF]) x 100%
8= ([H+]/0.1 M) x 100
(8) (0.1)/100 = [H+]
0.008 M = [H+]
pH = -log[H+] = -log (0.008) = 2.09
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