Chapter13 - Chapter 13 Homework 13.1 a 3 K(l AlCl3(s Al(s 3...

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Chapter 13 Homework 13.1 a) 3 K(l) + AlCl 3 (s) Æ Al(s) + 3 KCl(s) b) B 2 O 3 (s) + 2 NH 3 (g) Æ 2 BN(s) + 3 H 2 O(g) c) 2 Al(s) + 2 OH - (aq) + 6 H 2 O (aq) Æ 2 [Al(OH) 4 ] - (aq) + 3 H 2 (g) d) 2 B 4 H 10 (g) + 11 O 2 (g) Æ 4 B 2 O 3 (s) + 10 H 2 O(g) 13.2 a) BBr 3 (l) + 3 H 2 O(l) Æ H 3 BO 3 (aq) + 3 HBr(aq) b) 2 Al(s) + 6H + (aq) Æ 2 Al 3+ (aq) + 3 H 2 (g) c) Tl(OH)(aq) + CO 2 (g) Æ TlCO 3 (s) 13.4 B 4 C is the empirical formula; the more correct formula would be B 12 C 3 which is the molecular formula. In observing the structure of boron carbide, the substance is composed of boron icosahedra linked by carbon atoms (3 carbons). 13.6 The B 12 H 12 2- ion would be classified as closo- . This can be determined two ways: - formula, the ion has the general formula [B n H n ] 2- - structure, there are no “open faces” on the ion, it is a “closed” structure. 13.11 The hydrated aluminum ion acts as an acid in the following way: [ A l ( O H 2 ) 6 ] 3+ (aq) + H 2 O(l) Æ [Al(OH)(OH 2 ) 5 ] 2+ (aq) + H 3 O + (aq) 13.17 A spinel has the formula AB 2 X 4 , where A is a dipositive metal ion, B is a tripositive
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This note was uploaded on 11/16/2011 for the course CHEM 3510 taught by Professor Staff during the Fall '10 term at Valdosta State University .

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