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General Chemistry Principles, Patterns, and Applications, 2011

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N U M E R I C A L PR O BL E M S<br />

Please be sure you are familiar with the topics discussed in Essential Skills 2 (Section 3.7 "Essential Skills 2")<br />

before proceeding to the Numerical Problems.<br />

1. Classify each chemical reaction according to the types listed in Table 3.1 "Basic Types of Chemical Reactions".<br />

a. 12FeCl 2 (s) + 3O 2 (g) → 8FeCl 3 (s) + 2Fe 2 O 3 (s)<br />

b. CaCl 2 (aq) + K 2 SO 4 (aq) → CaSO 4 (s) + 2KCl(aq)<br />

c. HCl(aq) + NaOH(aq) → NaCl(aq) + H 2 O(l)<br />

d. Br 2 (l) + C 2 H 4 (g) → BrCH 2 CH 2 Br(l)<br />

2. Classify each chemical reaction according to the types listed in Table 3.1 "Basic Types of Chemical Reactions".<br />

a. 4FeO(s) + O 2 (g) → 2Fe 2 O 3 (s)<br />

b. Ca 3 (PO 4 ) 2 (s) + 3H 2 SO 4 (aq) → 3CaSO 4 (s) + 2H 3 PO 4 (aq)<br />

c. HNO 3 (aq) + KOH(aq) → KNO 3 (aq) + H 2 O(l)<br />

d. ethane(g) + oxygen(g) → carbon dioxide(g) + water(g)<br />

3. Assign oxidation states to the atoms in each compound or ion.<br />

a. (NH 4 ) 2 S<br />

b. the phosphate ion<br />

c. [AlF 6 ] 3−<br />

d. CuS<br />

−<br />

e. HCO 3<br />

+<br />

f. NH 4<br />

g. H 2 SO 4<br />

h. formic acid<br />

i. n-butanol<br />

4. Assign oxidation states to the atoms in each compound or ion.<br />

a. ClO 2<br />

−<br />

b. HO 2<br />

c. sodium bicarbonate<br />

d. MnO 2<br />

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

Saylor.org<br />

272

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