Question 2.14: Name the following acids: (a) HBrO(aq) (b) HCN(aq)...
Name the following acids:
(a) HBrO(aq) (b) HCN(aq)
Step-by-Step
STRATEGY
To name an acid, look at the formula and decide whether the compound is an oxoacid. If so, the name must reflect the number of oxygen atoms, according to Table 2.4. If the compound is not an oxoacid, it is named using the prefix hydro- and the suffix -ic acid.
(a) This compound is an oxoacid that yields hypobromite ion (BrO^{-}) when dissolved in water. Its name is hypobromous acid.
(b) This compound is not an oxoacid but yields cyanide ion when dissolved in water. As a pure gas, HCN is named hydrogen cyanide. In water solution, it is called hydro-cyanic acid.
TABLE 2.4 Some Common Oxoacids and Their Anions
| Oxoacid | Oxoanion | ||
| HNO_{2} | Nitrous acid | NO^{-}_{2} | Nitrite ion |
| HNO_{3} | Nitric acid | NO^{-}_{3} | Nitrate ion |
| H_{3}PO_{4} | Phosphoric acid | PO^{3-}_{4} | Phosphate ion |
| H_{2}SO_{3} | Sulfurous acid | SO^{2-}_{3} | Sulfite ion |
| H_{2}SO_{4} | Sulfuric acid | SO^{2-}_{4} | Sulfate ion |
| HClO | Hypochlorous acid | ClO^{-} | Hypochlorite ion |
| HClO_{2} | Chlorous acid | ClO^{-}_{2} | Chlorite ion |
| HClO_{3} | Chloric acid | ClO^{-}_{3} | Chlorite ion |
| HClO_{4} | Perchloric acid | ClO^{-}_{4} | Perchlorate ion |
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