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22 Chemistry of the Nonmetals Solutions to Exercises (b) HF reacts with the silica which is a major component of glass: 6HF(aq) + + + 2H+ (aq) (c) Iodide is oxidized by sulfuric acid, as shown in Figure 22.10. (d) The major factor is size; there is not room about Br for the three chlorides plus the two unshared electron pairs that would occupy the bromine valence shell orbitals. Oxygen and the Group 6A Elements (sections 22.5 and 22.6) 22.39 Analyze/Plan. Use information on the descriptive chemistry of oxygen given in Section 22.5 to complete and balance the equations. Solve. (a) 2HgO(s) (b) 2Cu(NO₃)₂(s) (c) PbS(s) + + (d) 2ZnS(s) + 2ZnO(s) + (e) + + O₂(g) hv (f) 22.40 (a) CaO(s) + Ca²⁺(aq) + (b) + 6H+ + (c) Na₂O₂(s) + (aq) + + H₂O₂(aq) (d) N₂O₃(g) + 2HNO₂(aq) (e) 2KO₂(s) + (aq) + (aq) + O₂(g) + H₂O₂(aq) (f) NO(g) + O₃(g) + O₂(g) 22.41 Analyze/Plan. Oxides of metals are bases, oxides of nonmetals are acids, oxides that act as both acids and bases are amphoteric and oxides that act as neither acids nor bases are neutral. Solve. (a) acidic (oxide of a nonmetal) (b) acidic (oxide of a nonmetal) (c) amphoteric (d) basic (oxide of a metal) 22.42 (a) Mn₂O₇ (higher oxidation state of Mn) (b) SnO₂ (higher oxidation state of Sn) (c) SO₃ (higher oxidation state of S) (d) SO₂ (more nonmetallic character of S) (e) Ga₂O₃ (more nonmetallic character of Ga) (f) SO₂ (more nonmetallic character of S) 676