EBK GENERAL, ORGANIC, & BIOLOGICAL CHEM
3rd Edition
ISBN: 9781259298424
Author: SMITH
Publisher: VST
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Textbook Question
Chapter 9, Problem 9.115P
Why is the pH of unpolluted rainwater lower than the pH of pure water?
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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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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
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Using 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
Ar
Chapter 9 Solutions
EBK GENERAL, ORGANIC, & BIOLOGICAL CHEM
Ch. 9.1 - Name each acid: (a)HF;(b)HNO3;(c)HCN.Ch. 9.1 - If the polyatomic anion C1O2- is called chlorite,...Ch. 9.1 - Which of the following species can be...Ch. 9.1 - Which of the following species can be...Ch. 9.1 - Classify each reactant as a Brønsted-Lowry acid or...Ch. 9.2 - Determine the conjugate acid of each species:...Ch. 9.2 - Determine the conjugate base of each species:...Ch. 9.2 - Draw the structure of the conjugate base of each...Ch. 9.2 - Label the acid and the base and the conjugate acid...Ch. 9.2 - Ammonia, NH3, is amphoteric. Draw the conjugate...
Ch. 9.2 - Prob. 9.11PCh. 9.3 - Diagrams represent three acids (HA) dissolved in...Ch. 9.3 - Label the stronger acid in each pair. Which acid...Ch. 9.3 - Are the reactants or products favored at...Ch. 9.3 - If lactic acid is similar in strength to acetic...Ch. 9.4 - Rank the acids in each group in order of...Ch. 9.4 - Use the acid dissociation constants in Table 9.3...Ch. 9.4 - Consider the weak acids, HCN and H2CO3. Which acid...Ch. 9.5 - Calculate the value of [OH-] from the given [H3O+]...Ch. 9.5 - Calculate the value of [H3O+] from the given [OH-]...Ch. 9.5 - Calculate the value of [H3O+] and [H3O-] in each...Ch. 9.6 - Convert each H3O+ concentration to a pH value. a....Ch. 9.6 - What H3O+ concentration corresponds to each pH...Ch. 9.6 - Prob. 9.24PCh. 9.6 - Convert each H3O+ concentration to a pH value....Ch. 9.6 - Prob. 9.26PCh. 9.7 - Write a balanced equation for each acid-base...Ch. 9.7 - Prob. 9.28PCh. 9.7 - The acid in acid rain is generally sulfuric acid...Ch. 9.7 - Write a balanced equation for the reaction of...Ch. 9.8 - Determine whether each salt forms an acidic,...Ch. 9.8 - Which of the following salts forms an aqueous...Ch. 9.9 - What is the molarity of an HCI solution if 25.5 mL...Ch. 9.9 - How many milliliters of 2.0MNaOH are needed to...Ch. 9.10 - Determine whether a solution containing each of...Ch. 9.10 - Consider a buffer prepared from the weak acid HCO3...Ch. 9.10 - Calculate the pH of a dihydrogen...Ch. 9.10 - What is the pH of a buffer that contains...Ch. 9 - Which of the following species can be...Ch. 9 - Which of the following species can be...Ch. 9 - Prob. 9.41PCh. 9 - Which of the following species can be...Ch. 9 - Prob. 9.43PCh. 9 - Draw the conjugate acid of each base. a. Br- b....Ch. 9 - Draw the conjugate base of each acid. HNO2 NH4+...Ch. 9 - Draw the conjugate base of each acid. H3O+ H2Se...Ch. 9 - Prob. 9.47PCh. 9 - Prob. 9.48PCh. 9 - Prob. 9.49PCh. 9 - Prob. 9.50PCh. 9 - Label the conjugate acid-base pairs in each...Ch. 9 - Label the conjugate acid-base pairs in each...Ch. 9 - Prob. 9.53PCh. 9 - Prob. 9.54PCh. 9 - Fill in the missing product in each acid-base...Ch. 9 - Fill in the missing product in each acid-base...Ch. 9 - Prob. 9.57PCh. 9 - Write the equation for the acid-base reaction that...Ch. 9 - Prob. 9.59PCh. 9 - Which diagram represents what happens when HCN...Ch. 9 - Prob. 9.61PCh. 9 - Prob. 9.62PCh. 9 - Prob. 9.63PCh. 9 - Use the data in and 9.2 and 9.3 to label the...Ch. 9 - Prob. 9.65PCh. 9 - Which acid, A or B, is stronger in each part? a. B...Ch. 9 - Fill in the missing terms (strong or weak) and...Ch. 9 - Fill in the missing terms (strong or weak) and...Ch. 9 - For each pair of acids: [1] Label the stronger...Ch. 9 - For each pair of acids: [1] Label the stronger...Ch. 9 - Prob. 9.71PCh. 9 - Prob. 9.72PCh. 9 - Prob. 9.73PCh. 9 - Label the acid in the reactants and the conjugate...Ch. 9 - Calculate the value of [OH-] from the given and...Ch. 9 - Calculate the value of [OH-] from the given [H3O+]...Ch. 9 - Calculate the value of [OH-] from the given [HO-]...Ch. 9 - Calculate the value of [H3O+] from the given [OH-]...Ch. 9 - Prob. 9.79PCh. 9 - Prob. 9.80PCh. 9 - Prob. 9.81PCh. 9 - Complete the following table with the needed...Ch. 9 - Prob. 9.83PCh. 9 - Prob. 9.84PCh. 9 - Prob. 9.85PCh. 9 - If pancreaticfluids have a pH of 8.2, calculate...Ch. 9 - Calculate the concentrations of H3O+ and OH in the...Ch. 9 - Prob. 9.88PCh. 9 - Prob. 9.89PCh. 9 - Prob. 9.90PCh. 9 - Prob. 9.91PCh. 9 - Prob. 9.92PCh. 9 - Write a balanced equation for each reaction. a....Ch. 9 - Prob. 9.94PCh. 9 - Prob. 9.95PCh. 9 - Prob. 9.96PCh. 9 - Prob. 9.97PCh. 9 - Prob. 9.98PCh. 9 - Prob. 9.99PCh. 9 - Prob. 9.100PCh. 9 - Whatisthe molarityofanaceticacid (CH3COOH)...Ch. 9 - What is the molarity of an H2SO4 solution if 18.5...Ch. 9 - How many milliliters of 1.0MNaOH solution are...Ch. 9 - How many milliliters of 2.0MNaOH solution are...Ch. 9 - Prob. 9.105PCh. 9 - Prob. 9.106PCh. 9 - Prob. 9.107PCh. 9 - Prob. 9.108PCh. 9 - Prob. 9.109PCh. 9 - Prob. 9.110PCh. 9 - Using the Ka values in Table9.6, calculate the pH...Ch. 9 - Using the Ka values in Table9.6, calculate the pH...Ch. 9 - Calculate the pH of an acetic acid/acetate buffer...Ch. 9 - Calculate the pH of a bicarbonate/carbonate buffer...Ch. 9 - Why is the pH of unpolluted rainwater lower than...Ch. 9 - Prob. 9.116PCh. 9 - Prob. 9.117PCh. 9 - A sample of rainwater has a pH of 4.18. Calculate...Ch. 9 - Prob. 9.119PCh. 9 - Prob. 9.120PCh. 9 - Prob. 9.121PCh. 9 - Prob. 9.122PCh. 9 - Prob. 9.123CPCh. 9 - Prob. 9.124CP
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