Chemical Principles
8th Edition
ISBN: 9781305581982
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Textbook Question
Chapter 15, Problem 76E
Consider the following potential energy plots
- Rank the reactions from fastest to slowest, and explain your answer. If any reactions have equal rates, explain why.
- Label the reactions as endothermic or exothermic, and supply your answer.
- Rank the exothermic reactions from greatest to least change in potential energy, and support youranswer.
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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:
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1.0 L of a 0.5 M HF
solution.
bases:
Х
other: ☐
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1.0 L of a solution that is
1.4M in both HF and NaF.
bases:
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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 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 15 Solutions
Chemical Principles
Ch. 15 - Prob. 1DQCh. 15 - Prob. 2DQCh. 15 - a graph of [A] versus time for zero-, first-, and...Ch. 15 - Prob. 4DQCh. 15 - Prob. 5DQCh. 15 - Prob. 6DQCh. 15 - Prob. 7DQCh. 15 - Prob. 8DQCh. 15 - Provide a conceptual rationale for the differences...Ch. 15 - Prob. 10E
Ch. 15 - Consider the general reaction aA+bBcC and the...Ch. 15 - Prob. 12ECh. 15 - Prob. 13ECh. 15 - Prob. 14ECh. 15 - Prob. 15ECh. 15 - The hydroxyl radical (OH) is an important...Ch. 15 - Prob. 17ECh. 15 - The reaction 2NO(g)+Cl2(g)2NOCl(g) was studied at...Ch. 15 - Prob. 19ECh. 15 - The following data were obtained for the gas-phase...Ch. 15 - Prob. 21ECh. 15 - Prob. 22ECh. 15 - Prob. 23ECh. 15 - Prob. 24ECh. 15 - Prob. 25ECh. 15 - Prob. 26ECh. 15 - Prob. 27ECh. 15 - Prob. 28ECh. 15 - If the half-life for a reaction is 20. seconds,...Ch. 15 - A certain reaction has the following general form:...Ch. 15 - Prob. 31ECh. 15 - Prob. 32ECh. 15 - The decomposition of hydrogen peroxide was studied...Ch. 15 - Prob. 34ECh. 15 - Prob. 35ECh. 15 - Prob. 36ECh. 15 - At 500K in the presence of a copper surface,...Ch. 15 - Experimental data for the reaction A2B+C have been...Ch. 15 - The reaction NO(g)+O3(g)NO2(g)+O2(g) was studied...Ch. 15 - Determine the forms of the integrated and the...Ch. 15 - Prob. 41ECh. 15 - Prob. 42ECh. 15 - Prob. 43ECh. 15 - Prob. 44ECh. 15 - Prob. 45ECh. 15 - Prob. 46ECh. 15 - Prob. 47ECh. 15 - Prob. 48ECh. 15 - Prob. 49ECh. 15 - Prob. 50ECh. 15 - Prob. 51ECh. 15 - Prob. 52ECh. 15 - Prob. 53ECh. 15 - Prob. 54ECh. 15 - Prob. 55ECh. 15 - Define each of the following. elementary step...Ch. 15 - Define what is meant by unimolecular and...Ch. 15 - What two requirements must be met to call a...Ch. 15 - Prob. 59ECh. 15 - Prob. 60ECh. 15 - A proposed mechanism for a reaction is...Ch. 15 - Is the mechanism NO+Cl2k1NOCl2NOCl2+NOk22NOCl...Ch. 15 - The reaction 2NO(g)+O2(g)2NO2(g) exhibits the rate...Ch. 15 - Prob. 64ECh. 15 - The reaction...Ch. 15 - Prob. 66ECh. 15 - Prob. 67ECh. 15 - Prob. 68ECh. 15 - The following mechanism is proposed for the...Ch. 15 - The following mechanism has been proposed to...Ch. 15 - Consider the hypothetical reaction BE+F which is...Ch. 15 - How is the rate of a reaction affected by each of...Ch. 15 - The central idea of the collision model is that...Ch. 15 - Prob. 74ECh. 15 - Prob. 75ECh. 15 - Consider the following potential energy plots Rank...Ch. 15 - Prob. 77ECh. 15 - Prob. 78ECh. 15 - Prob. 79ECh. 15 - Prob. 80ECh. 15 - Prob. 81ECh. 15 - Chemists commonly use a rule of thumb that an...Ch. 15 - Prob. 83ECh. 15 - Prob. 84ECh. 15 - Prob. 85ECh. 15 - Prob. 86ECh. 15 - For the following reaction profiles, indicate the...Ch. 15 - Prob. 88ECh. 15 - Prob. 89ECh. 15 - Prob. 90ECh. 15 - Prob. 91ECh. 15 - Prob. 92ECh. 15 - The decomposition of NH3 to N2 and H2 was studied...Ch. 15 - One pathway for the destruction of ozone in the...Ch. 15 - Prob. 95ECh. 15 - Prob. 96ECh. 15 - Prob. 97ECh. 15 - Prob. 98ECh. 15 - Prob. 99ECh. 15 - Prob. 100AECh. 15 - Prob. 101AECh. 15 - Prob. 102AECh. 15 - Prob. 103AECh. 15 - Prob. 104AECh. 15 - Prob. 105AECh. 15 - Prob. 106AECh. 15 - Prob. 107AECh. 15 - Prob. 108AECh. 15 - Prob. 109AECh. 15 - The decomposition of NO2(g) occurs by the...Ch. 15 - Prob. 111AECh. 15 - Prob. 112AECh. 15 - Prob. 113AECh. 15 - Prob. 114AECh. 15 - Prob. 115AECh. 15 - Prob. 116AECh. 15 - The compound NO2Cl is thought to decompose to NO2...Ch. 15 - Prob. 118AECh. 15 - Prob. 119AECh. 15 - Prob. 120AECh. 15 - Prob. 121AECh. 15 - Prob. 122AECh. 15 - Prob. 123AECh. 15 - Prob. 124AECh. 15 - Prob. 125AECh. 15 - Prob. 126AECh. 15 - Consider the following reaction: CH3X+YCH3Y+X At...Ch. 15 - The following data were collected in two studies...Ch. 15 - Prob. 129CPCh. 15 - For the reaction 2A+Bproducts afriend proposes the...Ch. 15 - Consider the hypothetical reaction A+B+2C2D+3E In...Ch. 15 - A reaction represented by the equation...Ch. 15 - Prob. 133CPCh. 15 - You are studying the kinetics of the reaction...Ch. 15 - Prob. 135CPCh. 15 - Prob. 136MP
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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. 2.2 mol of NaOH is added to 1.0 L of a 1.4M HF solution. acids: П bases: Х other: ☐ ப acids: 0.51 mol of KOH is added to 1.0 L of a solution that is bases: 1.3M in both HF and NaF. other: ☐ 00. 18 Ararrow_forwardUsing reaction free energy to predict equilibrium composition Consider the following equilibrium: N2O4 (g) 2NO2 (g) AG⁰ = 5.4 kJ Now suppose a reaction vessel is filled with 1.68 atm of dinitrogen tetroxide (N204) at 148. °C. Answer the following questions about this system: rise Under these conditions, will the pressure of N2O4 tend to rise or fall? x10 fall Is it possible to reverse this tendency by adding NO2? In other words, if you said the pressure of N2O4 will tend to rise, can that be changed to a tendency to fall by adding NO2? Similarly, if you said the pressure of N2O4 will tend to fall, can that be changed to a tendency to rise by adding NO2? If you said the tendency can be reversed in the second question, calculate the minimum pressure of NO 2 needed to reverse it. Round your answer to 2 significant digits. yes no 0.42 atm ☑ 5 0/5 ? مله Ararrow_forwardHomework 13 (Ch17) Question 4 of 4 (1 point) | Question Attempt: 2 of 2 ✓ 1 ✓ 2 = 3 4 Time Remaining: 4:25:54 Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free energy of the following chemical reaction: 2CH3OH (g)+302 (g) → 2CO2 (g) + 4H₂O (g) Round your answer to zero decimal places. ☐ kJ x10 ☐ Subm Check 2020 Hill LLC. All Rights Reserved. Terms of Use | Privacy Cearrow_forward
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