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General Chemistry Principles, Patterns, and Applications, 2011

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1. 0.106 M acetaminophen; acetaminophen is an organic compound that is much more soluble in ethanol than<br />

water, so using an ethanol/water mixture as the solvent allows a higher concentration of the drug to be used.<br />

2.<br />

3.<br />

a. 0.34 M Ca(HCO 3 ) 2<br />

b. 7.0 g H 2 CO 3<br />

4.<br />

5. 2.646 g citric acid, Ca 3 (C 6 H 5 O 7 ) 2<br />

6.<br />

7.<br />

a. 5CaO + 3HPO 2− 4 + 2H 2 O → Ca 5 (PO 4 ) 3 OH + 6OH −<br />

b. This is an acid–base reaction, in which the acid is the HPO 2− 4 ion <strong>and</strong> the base is CaO.<br />

Transferring a proton from the acid to the base produces the PO 3− 4 ion <strong>and</strong> the hydroxide<br />

ion.<br />

c. 2.2 lbs (1 kg) of lime<br />

d. 3.6 × 10 −4 2−<br />

M HPO 4<br />

8.<br />

9.<br />

a. Chloride is oxidized, <strong>and</strong> protons are reduced.<br />

b.<br />

Oxidation: 2Cl − → Cl 2 + 2e−Reduction: 2H 2 O + 2e− → H 2 + 2OH−<br />

c.<br />

2Cl − + 2H 2 O → Cl 2 + H 2 + 2OH −<br />

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

Saylor.org<br />

412

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