You may need Table 7.2 to answer the following questions.

a. Which is the stronger acid, \(\mathrm{H}_{2} \mathrm{SO}_{4}\) or \(\mathrm{H}_{2} \mathrm{O}\) ?

b. Which is the stronger acid, \(\mathrm{H}_{2} \mathrm{O}\) or \(\mathrm{HOCl}\) ?

c. Which is the stronger acid, \(\mathrm{NH}_{4}{ }^{+}\)or \(\mathrm{HC}_{2} \mathrm{H}_{2} \mathrm{ClO}_{2}\) ?

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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 10-2 1.35 x 10-3 7.2 x 10-4 4.0 x 10 1.8 x 10 1.4 x 10- 3.5 x 10-8 6.2 10-10 5.6 10-10 1.6 10-10 Increasing acid strength