Exercises in OpenStax Chemistry, Ch. 19-20
Ryan Kilby
CHM/150
May 24, 2017 Week Two Exercises in OpenStax Chemistry, Ch. 19-20 Chapter Nineteen
2. Write the electron configurations for each of the following elements and its ions:
(a) Ti
(b) Ti2+
(c) Ti3+
(d) Ti4+
8. The following reactions all occur in a blast furnace. Which of these are redox reactions?
(a) 3Fe2 O3(s) + CO(g) ⟶ 2Fe3 O4(s) + CO2(g)
(b) Fe3 O4(s) + CO(g) ⟶ 3FeO(s) + CO2(g)
(c) FeO(s) + CO(g) ⟶ Fe(l) + CO2(g)
(d) C(s) + O2(g) ⟶ CO2(g)
(e) C(s) + CO2(g) ⟶ 2CO(g)
(f) CaCO3(s) ⟶ CaO(s) + CO2(g)
(g) CaO(s) + SiO2(s) ⟶ CaSiO3(l)
22. Balance the following equations by oxidation-reduction methods; note that three
elements change oxidation state.
Co(NO3)2(s) ⟶ Co2 O3(s) + NO2(g) + O2(g) Chapter Twenty
8. How does the carbon-atom hybridization change when polyethylene is prepared from
ethylene?
10. Write the chemical formula, condensed formula, and Lewis structure for each of the
following hydrocarbons:
(a) heptane
(b) 3-methylhexane
(c) trans-3-heptene
(d) 4-methyl-1-hexene
(e) 2-heptyne
(f) 3,4-dimethyl-1-pentyne
.
22. Write Lewis structures and describe the molecular geometry at each carbon atom in
the following compounds:
(a) cis-3-hexene
(b) cis-1-chloro-2-bromoethene
(c) 2-pentyne
(d) trans-6-ethyl-7-methyl-2-octene
26. Write two complete, balanced equations for each of the following reactions, one using
condensed formulas and one using Lewis structures.
(a) 2-butene reacts with chlorine.
(b) benzene burns in air.
32. Give the complete IUPAC name for each of the following compounds:
(a) (b) (c) 36. Draw the condensed formulas for each of the following compounds:
(a) dipropyl ether
(b) 2,2-dimethyl-3-hexanol
(c) 2-ethoxybutane
46. Write a condensed structural formula, such as CH3CH3, and describe the molecular
geometry at each carbon atom.
(a) propene
(b) 1-butanol
(c) ethyl propyl ether
(d) cis-4-bromo-2-heptene
(e) 2,2,3-trimethylhexane
(f) formaldehyde
48. The foul odor of rancid butter is caused by butyric acid, CH3CH2CH2CO2H. (a) Draw the Lewis structure and determine the oxidation number and hybridization for
each carbon atom in the molecule.
(b) The esters formed from butyric acid are pleasant-smelling compounds found in fruits
and used in perfumes. Draw the Lewis structure for the ester formed from the reaction of
butyric acid with 2-propanol.
54. Write the Lewis structures of both isomers with the formula C2H7N. Reference
Rice University. (2015). OpenStax College. Retrieved from Rice University, Chemistry website.

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