Chemistry (7th Edition)
7th Edition
ISBN: 9780321943170
Author: John E. McMurry, Robert C. Fay, Jill Kirsten Robinson
Publisher: PEARSON
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Chapter 3, Problem 3.22A
APPLY 3.22
(a) Polychlorinated biphenyls (PCBs) were compounds used as coolants in transformers and capacitors, but their production was banned by the U.S. Congress in 1979 because they are highly toxic and persist in the environment. When 1.0 g of a PCB containing carbon, hydrogen, and chlorine was subjected to combustion analysis, 1.617 g of CO2 and 0.138 g of H2O were produced. What is the empirical formula?
(b) If the molecular weight is 326.26, what is the molecular formula?
(c) Can combustion analysis be used to determine the empirical formula of a compound containing carbon, hydrogen, oxygen, and chlorine?
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Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
2NO(g) +Cl₂ (g) = 2NOC1 (g) AGº = -41. kJ
Now suppose a reaction vessel is filled with 8.90 atm of chlorine (C12) and 5.71 atm of nitrosyl chloride (NOC1) at 1075. °C. Answer the following questions
about this system:
rise
Under these conditions, will the pressure of NOCI tend to rise or fall?
x10
fall
Is it possible to reverse this tendency by adding NO?
In other words, if you said the pressure of NOCI will tend to rise, can that
be changed to a tendency to fall by adding NO? Similarly, if you said the
pressure of NOCI will tend to fall, can that be changed to a tendency to
rise by adding NO?
yes
no
If you said the tendency can be reversed in the second question, calculate
the minimum pressure of NO needed to reverse it.
Round your answer to 2 significant digits.
atm
☑
18
Ar
Identifying the major species in weak acid or weak base equilibria
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at
equilibrium. You can leave out water itself.
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the
formulas of the species that will act as neither acids nor bases in the 'other' row.
You will find it useful to keep in mind that HCN is a weak acid.
acids:
0.29 mol of NaOH is added
to 1.0 L of a 1.2M HCN
solution.
bases:
☑
other:
0.09 mol of HCl is added to
acids:
1.0 L of a solution that is
bases:
0.3M in both HCN and
KCN.
other:
0,0,...
?
00.
18
Ar
日
Identifying the major species in weak acid or weak base equilibria
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at
equilibrium. You can leave out water itself.
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the
formulas of the species that will act as neither acids nor bases in the 'other' row.
You will find it useful to keep in mind that HF is a weak acid.
acids:
0.2 mol of KOH is added to
1.0 L of a 0.5 M HF
solution.
bases:
Х
other: ☐
acids:
0.10 mol of HI is added to
1.0 L of a solution that is
1.4M in both HF and NaF.
bases:
other: ☐
0,0,...
ด
?
18
Ar
Chapter 3 Solutions
Chemistry (7th Edition)
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2ACh. 3 - Prob. 3.3PCh. 3 - APPLY 3.4 The major ingredient in ordinary safety...Ch. 3 - Prob. 3.5PCh. 3 - Conceptual APPLY 3.6 Use the structural formula of...Ch. 3 - PRACTICE 3.7 How many moles arc in 5.26 g of...Ch. 3 - APPLY 3.8 When a diabetic experiences low blood...Ch. 3 - PRACTICE 3.9 Aspirin is prepared by reaction...Ch. 3 - APPLY 3.10 Refer to the balanced reaction for the...
Ch. 3 - PRACTICE 3.11 Ethyl alcohol is prepared...Ch. 3 - APPLY 3.12 (a) Diethyl ether (C4H10O), the “ether”...Ch. 3 - Conceptual PRACTICE 3.13 The following diagram...Ch. 3 - Conceptual APPLY 3.14 Draw a diagram similar to...Ch. 3 - Prob. 3.15PCh. 3 - APPLY 3.16 After lithium hydroxide is produced...Ch. 3 - PRACTICE 3.17 What is the empirical formula of the...Ch. 3 - Prob. 3.18PCh. 3 - Conceptual APPLY 3.19 Use the structural formula...Ch. 3 - PRACTICE 3.20 Menthol, a flavouring agent obtained...Ch. 3 - PRACTICE 321 Combustion analysis is performed on...Ch. 3 - APPLY 3.22 (a) Polychlorinated biphenyls (PCBs)...Ch. 3 - PRACTICE 3.23 A compound has an empirical formula...Ch. 3 - APPLY 3.24 Combustion analysis was performed on...Ch. 3 - Prob. 3.25PCh. 3 - PROBLEM 3.26 (a) Balance the reaction for...Ch. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - The reaction of A (red spheres) with B (blue...Ch. 3 - Prob. 3.30CPCh. 3 - Prob. 3.31CPCh. 3 - Prob. 3.32CPCh. 3 - Prob. 3.33CPCh. 3 - Prob. 3.34CPCh. 3 - Prob. 3.35CPCh. 3 - Which of the following equations are balanced? (a)...Ch. 3 - Which of the following equations are balanced?...Ch. 3 - Balance the following equations: (a)...Ch. 3 - Balance the following equations: (a) The explosion...Ch. 3 - Balance the following equations: (a)...Ch. 3 - Balance the following equations:...Ch. 3 - What are the molecular (formula) weights of the...Ch. 3 - What are the formulas of the following substances?...Ch. 3 - What are the molecular weights of the following...Ch. 3 - Prob. 3.45SPCh. 3 - How many grams are in a mole of each of the...Ch. 3 - Prob. 3.47SPCh. 3 - How many moles of ions are in 27.5 g of MgCl2?Ch. 3 - How many moles of anions are in 35.6 g of AlF3?Ch. 3 - What is the molecular weight of chloroform if...Ch. 3 - What is the molecular weight of cholesterol if...Ch. 3 - 3.52 Iron (II) sulfate, FeSO4, is prescribed for...Ch. 3 - Prob. 3.53SPCh. 3 - An average cup of coffee contains about 125 mg of...Ch. 3 - Prob. 3.55SPCh. 3 - A sample that weighs 25.12 g contains 6.0221023...Ch. 3 - Prob. 3.57SPCh. 3 - Prob. 3.58SPCh. 3 - Prob. 3.59SPCh. 3 - Prob. 3.60SPCh. 3 - An alternative method for preparing pure iron from...Ch. 3 - Prob. 3.62SPCh. 3 - Prob. 3.63SPCh. 3 - Prob. 3.64SPCh. 3 - Prob. 3.65SPCh. 3 - Prob. 3.66SPCh. 3 - Prob. 3.67SPCh. 3 - Prob. 3.68SPCh. 3 - Prob. 3.69SPCh. 3 - Prob. 3.70SPCh. 3 - 3.71 Hydrogen and chlorine react to yield hydrogen...Ch. 3 - Prob. 3.72SPCh. 3 - Prob. 3.73SPCh. 3 - Nickel (ll) sulfate, used for nickel plating, is...Ch. 3 - Prob. 3.75SPCh. 3 - Prob. 3.76SPCh. 3 - Prob. 3.77SPCh. 3 - Prob. 3.78SPCh. 3 - Prob. 3.79SPCh. 3 - Prob. 3.80SPCh. 3 - Prob. 3.81SPCh. 3 - Prob. 3.82SPCh. 3 - Prob. 3.83SPCh. 3 - Prob. 3.84SPCh. 3 - Prob. 3.85SPCh. 3 - Prob. 3.86SPCh. 3 - What are the empirical formulas of each of the...Ch. 3 - Prob. 3.88SPCh. 3 - 3.89 Coniine, a toxic substance isolated from...Ch. 3 - Prob. 3.90SPCh. 3 - Prob. 3.91SPCh. 3 - Prob. 3.92SPCh. 3 - Prob. 3.93SPCh. 3 - Prob. 3.94SPCh. 3 - Prob. 3.95SPCh. 3 - Prob. 3.96SPCh. 3 - Prob. 3.97SPCh. 3 - 3.98 The molecular weight of an organic compound...Ch. 3 - Prob. 3.99SPCh. 3 - Prob. 3.100SPCh. 3 - (a) Combustion analysis of 150.0 mg of 1, 2, 3,...Ch. 3 - Prob. 3.102CPCh. 3 - Prob. 3.103CPCh. 3 - Prob. 3.104CPCh. 3 - Prob. 3.105CPCh. 3 - Prob. 3.106CPCh. 3 - Prob. 3.107CPCh. 3 - Prob. 3.108CPCh. 3 - Ferrocene, a substance proposed for use as a...Ch. 3 - Prob. 3.110CPCh. 3 - Ethylene glycol, commonly used as automobile...Ch. 3 - Prob. 3.112CPCh. 3 - Prob. 3.113CPCh. 3 - Prob. 3.114CPCh. 3 - Prob. 3.115CPCh. 3 - A pulverized rock sample believed to be pure...Ch. 3 - Prob. 3.117CPCh. 3 - Prob. 3.118CPCh. 3 - Prob. 3.119CPCh. 3 - Prob. 3.120CPCh. 3 - Prob. 3.121CPCh. 3 - Prob. 3.122CPCh. 3 - Prob. 3.123CPCh. 3 - Prob. 3.124CPCh. 3 - Prob. 3.125CPCh. 3 - Prob. 3.126CP
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