Strengths of Acids and Bases
For each of the following questions, select from \mathrm{HCO_{3}}^{-},\mathrm{H}_{2}\mathrm{SO}_{4}, or \operatorname{HNO}_{2} :
a. Which is the strongest acid?
b. Which acid is the weakest?
a. The strongest acid in this group is the acid listed closest to the top of Table 8.3, which is \mathrm{H}_{2}\mathrm{SO}_{4} .
b. The weakest acid in this group is the acid listed closest to the bottom of Table 8.3, which is {\mathrm{{HCO}}_{3}}^{-} .
TABLE 8.3 Common Strong and Weak Acids | |
Strong Acids | |
Hydroiodic acid | HI |
Hydrobromic acid | HBr |
Perchloric acid | \mathrm{H}\mathrm{CIO}_{4} |
Hydrochloric acid | HCl |
Sulfuric acid | \mathrm{H}_{2}\mathrm{SO}_{4} |
Nitric acid | {\mathrm{{HNO}}_{3}} |
Weak Acids | |
Hydronium ion | {\mathrm{H}_{3}\mathrm{O}}^{+} |
Hydrogen sulfate ion | {\mathrm{H}\mathrm{SO}_{4}}^{-} |
Phosphoric acid | \mathrm{H}_{3}\mathrm{PO}_{4} |
Hydrofluoric acid | HF |
Nitrous acid | {\mathrm{{HNO}}_{2}} |
Acetic acid | \mathrm{HC}_{2}\mathrm{H}_{3}\mathrm{O}_{2} |
Carbonic acid | \mathrm{H}_{2}\mathrm{CO}_{3} |
Hydrosulfuric acid | \mathrm{H}_{2}\mathrm{S} |
Dihydrogen phosphate | {\mathrm{H}_{2}\mathrm{PO}_{4}}^{2-} |
Ammonium ion | {\mathrm{NH}_{4}}^{+} |
Hydrocyanic acid | HCN |
Bicarbonate ion | {\mathrm{{HCO}}_{3}}¯ |
Hydrogen sulfide ion | HS¯ |
Water | \mathrm{H}_{2}\mathrm{O} |