Pushing Electrons
4th Edition
ISBN: 9781133951889
Author: Weeks, Daniel P.
Publisher: Cengage Learning
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Textbook Question
Chapter 1, Problem 12EQ
Adding electrons to the skeleton by making single bonds between all bonded atoms gives
Each hydrogen atom now has a pair of electrons, but each carbon has only 6 electrons.
Adding a pair of electrons to each carbon gives the trial structure
The number of electrons in the trial structure is ____. Since this number exceeds the number of available valence electrons, the structure is incorrect.
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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
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 NH3 is a weak base.
acids: ☐
1.8 mol of HCl is added to
1.0 L of a 1.0M NH3
bases: ☐
solution.
other: ☐
0.18 mol of HNO3 is added
to 1.0 L of a solution that is
1.4M in both NH3 and
NH₁Br.
acids:
bases: ☐
other: ☐
0,0,...
?
000
18
Ar
B
1
Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
2NH3 (g) = N2 (g) +3H₂
—N2 (g) AGº = 34. kJ
Now suppose a reaction vessel is filled with 4.19 atm of ammonia (NH3) and 9.94 atm of nitrogen (N2) at 378. °C. Answer the following questions about this
system:
rise
Under these conditions, will the pressure of NH 3 tend to rise or fall?
☐ x10
fall
Х
Is it possible to reverse this tendency by adding H₂?
In other words, if you said the pressure of NH 3 will tend to rise, can that
be changed to a tendency to fall by adding H₂? Similarly, if you said the
pressure of NH3 will tend to fall, can that be changed to a tendency to
rise by adding H₂?
If you said the tendency can be reversed in the second question, calculate
the minimum pressure of H₂ needed to reverse it.
Round your answer to 2 significant digits.
yes
no
atm
00.
18
Ar
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Chapter 1 Solutions
Pushing Electrons
Ch. 1 - 1. Hydrogen is a Group I element and each...Ch. 1 - Methanol has the molecular formula CH4O. Its...Ch. 1 - 3. The skeleton of chloromethane is...Ch. 1 - 4. Methanol’s skeleton is
Connecting all bonded...Ch. 1 - 5. The structure for chloromethane is
It...Ch. 1 - Prob. 6EQCh. 1 - 7. Dimethyl ether
No. of electrons in...Ch. 1 - Methylamine (CH5N) No. of electrons in structure...Ch. 1 - Methanethiol (CH4S) No. of electrons in structure...Ch. 1 - Methylal (C3H8O2) No. of electrons in structure...
Ch. 1 - Prob. 11EQCh. 1 - Adding electrons to the skeleton by making single...Ch. 1 - This is done by removing an unshared pair from...Ch. 1 - Prob. 14EQCh. 1 - Prob. 15EQCh. 1 - Prob. 16EQCh. 1 - The skeleton of acetyl chloride is . Write the...Ch. 1 - Three constitutional isomers exist for the formula...Ch. 1 - A number of constitutional isomers exist for the...Ch. 1 - Using the method outlined above, derive the...Ch. 1 - Prob. 21EQCh. 1 - Prob. 22EQCh. 1 - Prob. 23EQCh. 1 - Prob. 24EQCh. 1 - The skeleton of benzyldimethylamine is
The...Ch. 1 - The skeleton is benzaldoxime is The number of...Ch. 1 - Prob. 27EQCh. 1 - Derive Lewis structures for the compounds below....Ch. 1 - Prob. 29EQCh. 1 - Derive Lewis structures for the compounds below....Ch. 1 - Prob. 31EQCh. 1 - Derive Lewis structures for the compounds below....Ch. 1 - The Lewis structure of acetone is Circling the...Ch. 1 - Chloromethane has the Lewis...Ch. 1 - In the Lewis structure for chloromethane, the...Ch. 1 - Prob. 36EQCh. 1 - The oxygen atom in acetone possesses ____ unshared...Ch. 1 - Nitrobenzene has the skeleton
The number of...Ch. 1 - Prob. 39EQCh. 1 - Compute and add on the formal charges I these...Ch. 1 - Prob. 41EQCh. 1 - Prob. 42EQCh. 1 - Prob. 43EQCh. 1 - Prob. 44EQCh. 1 - Prob. 45EQCh. 1 - Prob. 46EQCh. 1 - Prob. 47EQCh. 1 - Compute and add on the formal charges in these...Ch. 1 - Prob. 49EQCh. 1 - Prob. 50EQCh. 1 - The n-propyl cation can be formed from a molecule...Ch. 1 - Prob. 52EQCh. 1 - Prob. 53EQCh. 1 - Methanol, CH3OH, is a compound in which the formal...Ch. 1 - When a proton becomes bonded to diethyl ether, by...Ch. 1 - Tetrahydrofuran has the structure
When a proton...Ch. 1 - Prob. 57EQCh. 1 - Prob. 58EQCh. 1 - The structure of pyridine is
When a proton...Ch. 1 - The carbon atom owns one electron from each of ...Ch. 1 - The n-butyl anion can be formed from When the CLi...Ch. 1 - The isobutyl anion can be formed from When the CNa...Ch. 1 - Prob. 63EQCh. 1 - Ethanol, , is a compound in which the formal...Ch. 1 - The loss of a proton attached to the oxygen atom...Ch. 1 - A very strong base can remove a proton from...Ch. 1 - Prob. 67EQCh. 1 - Prob. 68EQCh. 1 - Prob. 69EQCh. 1 - The homolysis of the OO bond in diacetyl peroxide...Ch. 1 - Prob. 71EQCh. 1 - Prob. 72EQCh. 1 - Prob. 73EQCh. 1 - Prob. 74EQCh. 1 - Prob. 75EQCh. 1 - Heterolytic cleavage of the CO bond to yield a...Ch. 1 - Prob. 77EQCh. 1 - Prob. 78EQCh. 1 - Prob. 79EQCh. 1 - Prob. 80EQ
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- Identifying the major species in weak acid or weak base equilibria Your answer is incorrect. • Row 2: Your answer is incorrect. • Row 3: Your answer is incorrect. • Row 6: Your answer is incorrect. 0/5 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: HF 0.1 mol of NaOH is added to 1.0 L of a 0.7M HF solution. bases: 0.13 mol of HCl is added to 1.0 L of a solution that is 1.0M in both HF and KF. Exponent other: F acids: HF bases: F other: K 1 0,0,... ? 000 18 Ararrow_forwardUsing reaction free energy to predict equilibrium composition Consider the following equilibrium: 2NOCI (g) 2NO (g) + Cl2 (g) AGº =41. kJ Now suppose a reaction vessel is filled with 4.50 atm of nitrosyl chloride (NOCI) and 6.38 atm of chlorine (C12) at 212. °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. 0.035 atm ✓ G 00. 18 Ararrow_forwardHighlight each glycosidic bond in the molecule below. Then answer the questions in the table under the drawing area. HO- HO- -0 OH OH HO NG HO- HO- OH OH OH OH NG OHarrow_forward
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