Chemical Principles
8th Edition
ISBN: 9781337247269
Author: Steven S. Zumdahl; Donald J. DeCoste
Publisher: Cengage Learning US
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Chapter 12, Problem 25E
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Calculating the pH of a weak base titrated with a strong acid
An analytical chemist is titrating 184.2 mL of a 0.7800M solution of dimethylamine ((CH3)
NH with a 0.3000M solution of HClO4. The pK₁ of
dimethylamine is 3.27. Calculate the pH of the base solution after the chemist has added 424.1 mL of the HClO solution to it.
2
4
Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HClO 4 solution added.
Round your answer to 2 decimal places.
pH = ☐
☑
?
000
18
Ar
1
B
Using the Nernst equation to calculate nonstandard cell voltage
A galvanic cell at a temperature of 25.0 °C is powered by the following redox reaction:
MnO2 (s)+4H* (aq)+2Cr²+ (aq) → Mn²+ (aq)+2H₂O (1)+2Cr³+ (aq)
+
2+
2+
3+
Suppose the cell is prepared with 7.44 M H* and 0.485 M Cr²+ in one half-cell and 7.92 M Mn² and 3.73 M Cr³+ in the other.
Calculate the cell voltage under these conditions. Round your answer to 3 significant digits.
☐
x10
μ
Х
5
?
000
日。
Calculating standard reaction free energy from standard reduction...
Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free energy AG° for the following redox reaction.
Be sure your answer has the correct number of significant digits.
NO (g) +H₂O (1) + Cu²+ (aq) → HNO₂ (aq) +H* (aq)+Cu* (aq)
kJ
-
☐ x10
x10
olo
18
Ar
Chapter 12 Solutions
Chemical Principles
Ch. 12 - Prob. 1DQCh. 12 - Prob. 2DQCh. 12 - Prob. 3DQCh. 12 - The first four ionization energies for elements X...Ch. 12 - Prob. 5DQCh. 12 - Prob. 6DQCh. 12 - Prob. 7DQCh. 12 - Prob. 8DQCh. 12 - Prob. 9DQCh. 12 - Prob. 10DQ
Ch. 12 - Prob. 11DQCh. 12 - Prob. 12DQCh. 12 - Prob. 13DQCh. 12 - Prob. 14DQCh. 12 - Prob. 15DQCh. 12 - Prob. 16DQCh. 12 - Prob. 17DQCh. 12 - Is the following statement true or false: The...Ch. 12 - Which is higher in energy: the 2s or 2p orbital in...Ch. 12 - Prove mathematically that it is more energetically...Ch. 12 - Microwave radiation has a wavelength on the order...Ch. 12 - Consider the following waves representing...Ch. 12 - Prob. 23ECh. 12 - Human color vision is “produced” by the nervous...Ch. 12 - One type of electromagnetic radiation has a...Ch. 12 - Carbon absorbs energy at a wavelength of 150. nm....Ch. 12 - Prob. 27ECh. 12 - X rays have wavelengths on the order of 110-10m...Ch. 12 - The work function of an element is the energy...Ch. 12 - Ionization energy is the energy required to remove...Ch. 12 - It takes 208.4 kJ of energy to remove 1 mole of...Ch. 12 - What experimental evidence supports the quantum...Ch. 12 - Explain the photoelectric effect.Ch. 12 - Calculate the de Broglie wavelength for each of...Ch. 12 - Neutron diffraction is used in determining the...Ch. 12 - Calculate the velocities of electrons with de...Ch. 12 - An atom of a particular element is traveling at 1%...Ch. 12 - Characterize the Bohr model of the atom. In the...Ch. 12 - Prob. 39ECh. 12 - Consider only the transitions involving the first...Ch. 12 - Calculate the longest and shortest wavelengths of...Ch. 12 - Prob. 42ECh. 12 - Assume that a hydrogen atom’s electron has been...Ch. 12 - What is the maximum wavelength of light capable...Ch. 12 - An electron is excited from the ground state to...Ch. 12 - Does a photon of visible light (=400700nm)...Ch. 12 - An excited hydrogen atom emits light with a...Ch. 12 - An excited hydrogen atom with an electron in the n...Ch. 12 - Consider an electron for a hydrogen atom in an...Ch. 12 - Prob. 50ECh. 12 - One of the emission spectral lines for Be3+ has a...Ch. 12 - The Heisenberg uncertainty principle can be...Ch. 12 - Using the Heisenberg uncertainty principle,...Ch. 12 - We can represent both probability and radial...Ch. 12 - Prob. 55ECh. 12 - Calculate the wavelength of the electromagnetic...Ch. 12 - An electron in a one-dimensional box requires a...Ch. 12 - An electron in a 10.0-nm one-dimensional box is...Ch. 12 - Prob. 59ECh. 12 - What is the total probability of finding a...Ch. 12 - Which has the lowest (ground-state) energy, an...Ch. 12 - What are quantum numbers? What information do...Ch. 12 - How do 2p orbitals differ from each other? How do...Ch. 12 - Identify each of the following orbitals, and...Ch. 12 - Which of the following orbital designations are...Ch. 12 - Prob. 66ECh. 12 - The following sets of quantum numbers are not...Ch. 12 - How many orbitals can have the designation 5p,...Ch. 12 - How many electrons in an atom can have the...Ch. 12 - Prob. 70ECh. 12 - Prob. 71ECh. 12 - From the diagrams of 2p and 3p orbitals in Fig....Ch. 12 - Prob. 73ECh. 12 - Prob. 74ECh. 12 - Total radial probability distributions for the...Ch. 12 - The relative orbital levels for the hydrogen atom...Ch. 12 - What is the difference between core electrons and...Ch. 12 - Prob. 78ECh. 12 - Prob. 79ECh. 12 - The elements of Si, Ga, As, Ge, Al, Cd, S, and Se...Ch. 12 - Write the expected electron configurations for the...Ch. 12 - Write the expected electron configurations for...Ch. 12 - Prob. 83ECh. 12 - Using Fig. 12.29, list elements (ignore the...Ch. 12 - Prob. 85ECh. 12 - Prob. 86ECh. 12 - Prob. 87ECh. 12 - Prob. 88ECh. 12 - Prob. 89ECh. 12 - Prob. 90ECh. 12 - Prob. 91ECh. 12 - Prob. 92ECh. 12 - Prob. 93ECh. 12 - Prob. 94ECh. 12 - Prob. 95ECh. 12 - A certain oxygen atom has the electron...Ch. 12 - Prob. 97ECh. 12 - Prob. 98ECh. 12 - Prob. 99ECh. 12 - Explain why the first ionization energy tends to...Ch. 12 - Prob. 101ECh. 12 - The radius trend and the ionization energy trend...Ch. 12 - Prob. 103ECh. 12 - Prob. 104ECh. 12 - In each of the following sets, which atom or ion...Ch. 12 - Prob. 106ECh. 12 - Prob. 107ECh. 12 - Prob. 108ECh. 12 - Prob. 109ECh. 12 - Prob. 110ECh. 12 - Prob. 111ECh. 12 - Consider the following ionization energies for...Ch. 12 - Prob. 113ECh. 12 - Prob. 114ECh. 12 - Prob. 115ECh. 12 - Prob. 116ECh. 12 - Prob. 117ECh. 12 - Prob. 118ECh. 12 - Prob. 119ECh. 12 - Prob. 120ECh. 12 - Prob. 121ECh. 12 - Prob. 122ECh. 12 - Prob. 123ECh. 12 - Prob. 124ECh. 12 - Prob. 125ECh. 12 - Prob. 126ECh. 12 - Prob. 127ECh. 12 - Prob. 128AECh. 12 - Prob. 129AECh. 12 - Prob. 130AECh. 12 - Prob. 131AECh. 12 - Prob. 132AECh. 12 - Prob. 133AECh. 12 - Prob. 134AECh. 12 - Prob. 135AECh. 12 - Prob. 136AECh. 12 - Prob. 137AECh. 12 - Prob. 138AECh. 12 - Prob. 139AECh. 12 - An unknown element is a nonmetal and has a...Ch. 12 - Prob. 141AECh. 12 - Using data from this chapter, calculate the change...Ch. 12 - Answer the following questions, assuming that ms...Ch. 12 - Prob. 144AECh. 12 - Prob. 145AECh. 12 - Prob. 146AECh. 12 - The figure below represents part of the emission...Ch. 12 - Prob. 148AECh. 12 - Prob. 149AECh. 12 - Prob. 150AECh. 12 - Prob. 151AECh. 12 - Prob. 152AECh. 12 - Prob. 153AECh. 12 - Identify the following three elements. a. The...Ch. 12 - Prob. 155AECh. 12 - Prob. 156AECh. 12 - Prob. 157AECh. 12 - Prob. 158CPCh. 12 - The ground state ionization energy for the one...Ch. 12 - When the excited electron in a hydrogen atom falls...Ch. 12 - Prob. 161CPCh. 12 - The following numbers are the ratios of second...Ch. 12 - Prob. 163CPCh. 12 - Prob. 164CPCh. 12 - Prob. 165CPCh. 12 - Prob. 166CPCh. 12 - The ionization energy for a 1s electron in a...Ch. 12 - Without looking at data in the text, sketch a...
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