NAMING ACIDS Name the following acids: (a) HBrO(aq) (b) H2S(aq) 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 4.4. If the compound is not an oxoacid, it is named using the

Question

NAMING ACIDS

Name the following acids:

(a) HBrO(aq) (b) [latex]H_{2}S(aq)[/latex]

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 4.4. If the compound is not an oxoacid, it is named using the prefix hydro- and the suffix -ic acid.

TABLE 4.4 Common Oxoacids and Their Anions

Oxoacid Oxoanion

[latex]HNO_{2}[/latex] Nitrous acid [latex]NO_{2}^{-}[/latex] Nitrite ion
[latex]HNO_{3}[/latex] Nitric acid [latex]NO_{3}^{-}[/latex] Nitrate ion
[latex]H_{3}PO_{4}[/latex] Phosphoric acid [latex]PO_{4}^{3-}[/latex] Phosphate ion
[latex]H_{2}SO_{3}[/latex] Sulfurous acid [latex]SO_{3}^{2-}[/latex] Sulfite ion
[latex]H_{2}SO_{4}[/latex] Sulfuric acid [latex]SO_{4}^{2-}[/latex] Sulfate ion
HClO Hypochlorous acid [latex]CIO^{-}[/latex] Hypochlorite ion
H[latex]CIO_{2}[/latex] Chlorous acid [latex]CIO_{2}^{-}[/latex] Chlorite ion
H[latex]CIO_{3}[/latex] Chloric acid [latex]CIO_{3}^{-}[/latex] Chlorate ion
H[latex]CIO_{4}[/latex] Perchloric acid [latex]CIO_{4}^{-}[/latex] Perchlorate ion

Accepted Answer

(a) This compound is an oxoacid that yields hypobromite ion ([latex]BrO^{-}[/latex]) when dissolved in water. Its name is hypobromous acid.
(b) This compound is not an oxoacid but yields sulfide ion when dissolved in water. As a pure gas, [latex]H_{2}S[/latex] is named hydrogen sulfide. In water solution, it is called hydrosulfuric acid.

Question 4.6: NAMING ACIDS Name the following acids: (a) HBrO(aq) (b) H2S...

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