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General Chemistry Principles, Patterns, and Applications, 2011

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e. 5.86 × 10 −4 M<br />

6.<br />

7. 22.4 mg; a secondary reaction occurs, where OH − from the dissociation of the salt reacts with H + from the<br />

dissociation of water. This reaction causes further dissociation of the salt (Le Châtelier’s principle).<br />

8.<br />

9. 1.2 × 10 −10<br />

10.<br />

11. 1.70 × 10 −5<br />

12.<br />

13.<br />

14.<br />

15.<br />

a. 8.8 × 10 −6<br />

b. 6.7 × 10 −9<br />

c. 9.0 × 10 −8<br />

d. 2.16 × 10 −9<br />

16.<br />

17. 7.4 × 10 −6 M; 2.1 mg<br />

18.<br />

19. Precipitation will occur in all cases.<br />

20.<br />

21. 8.27 g<br />

[1] As you will discover in Section 17.4 "Solubility <strong>and</strong> pH" <strong>and</strong> in more advanced chemistry courses, basic anions,<br />

such as S 2− 3− 2−<br />

, PO 4 , <strong>and</strong> CO 3 , react with water to produce OH − <strong>and</strong> the corresponding protonated anion.<br />

Consequently, their calculated molarities, assuming no protonation in aqueous solution, are only approximate.<br />

[2] The exceptions generally involve the formation of complex ions, which is discussed inSection 17.3 "The<br />

Formation of Complex Ions".<br />

17.2 Factors That Affect Solubility<br />

Saylor URL: http://www.saylor.org/books<br />

Saylor.org<br />

1579

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