Use Table 7.2 to order the following from the strongest to the weakest acid.

\[\mathrm{HClO}_{2}, \mathrm{H}_{2} \mathrm{O}, \quad \mathrm{NH}_{4}^{+}, \quad \mathrm{HClO}_{4}\]

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TABLE 7.2 Values of K for Some Common Monoprotic Acids Formula Name Hydrogen sulfate ion Chlorous acid HSO4 HCIO HCHCIO HF HNO HCH3O2 [Al(HO)]+ HOCI HCN NH4+ HOC6H5 Monochloracetic acid Hydrofluoric acid Nitrous acid Acetic acid Hydrated aluminum(III) ion Hypochlorous acid Hydrocyanic acid Ammonium ion Phenol Value of K 1.2 x 10- 1.2 x 10- 1.35 x 10-3 7.2 x 10-4 4.0 x 10 1.8 x 10-5 1.4 x 10- 3.5 x 10-8 6.2 10-10 5.6 10-10 1.6 10-10 Increasing acid strength