Chemistry
13th Edition
ISBN: 9781259911156
Author: Raymond Chang Dr., Jason Overby Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 9.5, Problem 2PE
Which of the following bonds is covalent, which is polar covalent, and which is ionic? (a) the bond in CsCl, (b) the bond in H2S, (c) the NN bond in H2NNH2
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Consider the formate ion, HCO2", which is the anion
formed when formic acid loses an H* ion. The H and
the two O atoms are bonded to the central C atom.
(a) Draw the best Lewis structure(s) for this ion.
(b) Are resonance structures needed to describe the
structure? Explain briefly
(c) Would you predict that the C-O bond lengths in
the formate ion would be longer or shorter relative to
those in CO2? Explain briefly
(a) Use a polar arrow to indicate the polarity of each bond: N¬H, F¬N, I¬Cl. (b) Rank the following bonds in order of increasing polarity and decreasing percent ionic character: H¬N, H¬O, H¬C.
7.
Consider the following compounds: BaBr 2, MgCl 2, and SrCl 2. Answer the following questions based
on expected periodic trends:
(a) Which is expected to have the shortest ionic bonds?
(b) Which is expected to have the highest lattice energy?
(c) Which is expected to have the lowest melting point?
Chapter 9 Solutions
Chemistry
Ch. 9.1 - Prob. 1RCFCh. 9.1 - Using only the periodic table, determine the Lewis...Ch. 9.1 - To what group on the periodic table does element X...Ch. 9.2 - Use Lewis dot symbols to represent the formation...Ch. 9.2 - Use Lewis dot symbols to represent the formation...Ch. 9.3 - Which of the following compounds has a larger...Ch. 9.3 - Arrange the compounds NaF, MgO, and AIN in order...Ch. 9.4 - Why is it not possible for hydrogen to form double...Ch. 9.4 - Arrange the bonds NN, NN, and NN in order of...Ch. 9.5 - Which of the following bonds is covalent, which is...
Ch. 9.5 - Rank the bonds BH, CCl, and PP in order of...Ch. 9.5 - Classify the following bonds as covalent, polar...Ch. 9.5 - Identify the electrostatic potential maps shown...Ch. 9.6 - Write the Lewis structure for carbon disulfide...Ch. 9.6 - Write the Lewis structure for formic acid (HCOOH).Ch. 9.6 - Write the Lewis structure for the nitrite ion...Ch. 9.6 - Write the Lewis structure for PCl3.Ch. 9.6 - Write the Lewis structure for CN.Ch. 9.6 - The molecular model shown here represents guanine,...Ch. 9.7 - Write formal charges for the nitrite ion (NO2).Ch. 9.7 - Draw the most reasonable Lewis structure of a...Ch. 9.7 - Write the formal charges on H, C, and N,...Ch. 9.7 - Write the formal charges on O and Cl,...Ch. 9.7 - Consider three possible atomic arrangements for...Ch. 9.8 - Draw three resonance structures for the...Ch. 9.8 - Draw three resonance structures for SO2.Ch. 9.8 - The molecular model shown here represents...Ch. 9.9 - Prob. 9PECh. 9.9 - Prob. 10PECh. 9.9 - Prob. 11PECh. 9.9 - Write the Lewis structure of sulfur tetrafluoride...Ch. 9.9 - Both boron and aluminum tend to form compounds in...Ch. 9.9 - Draw a Lewis structure for IF5.Ch. 9.9 - Prob. 3RCFCh. 9.10 - Calculate the enthalpy of the reaction...Ch. 9.10 - For the reaction H2(g)+C2H4(g)C2H6(g) (a) Estimate...Ch. 9.10 - Why does Hrxn calculated using bond enthalpies not...Ch. 9.10 - Using bond enthalpy values, predict the enthalpy...Ch. 9 - What is a Lewis dot symbol? To what elements does...Ch. 9 - Use the second member of each group from Group 1A...Ch. 9 - Prob. 9.3QPCh. 9 - Write Lewis dot symbols for the following ions:...Ch. 9 - Write Lewis dot symbols for the following atoms...Ch. 9 - Explain what an ionic bond is.Ch. 9 - Prob. 9.7QPCh. 9 - Name five metals and five nonmetals that are very...Ch. 9 - Name one ionic compound that contains only...Ch. 9 - Name one ionic compound that contains a polyatomic...Ch. 9 - Prob. 9.11QPCh. 9 - In which of the following states would NaCl be...Ch. 9 - Prob. 9.14QPCh. 9 - An ionic bond is formed between a cation A+ and an...Ch. 9 - Prob. 9.16QPCh. 9 - Use Lewis dot symbols to show the transfer of...Ch. 9 - Prob. 9.18QPCh. 9 - For each of the following pairs of elements, state...Ch. 9 - Prob. 9.20QPCh. 9 - What is lattice energy and what role does it play...Ch. 9 - Explain how the lattice energy of an ionic...Ch. 9 - Specify which compound in the following pairs of...Ch. 9 - Compare the stability (in the solid state) of the...Ch. 9 - Use the Born-Haber cycle outlined in Section 9.3...Ch. 9 - Calculate the lattice energy of calcium chloride...Ch. 9 - What is Lewiss contribution to our understanding...Ch. 9 - Use an example to illustrate each of the following...Ch. 9 - What is the difference between a Lewis dot symbol...Ch. 9 - How many lone pairs are on the underlined atoms in...Ch. 9 - Compare single, double, and triple bonds in a...Ch. 9 - Compare the properties of ionic compounds and...Ch. 9 - Define electronegativity, and explain the...Ch. 9 - List the following bonds in order of increasing...Ch. 9 - Arrange the following bonds in order of increasing...Ch. 9 - Four atoms are arbitrarily labeled D, E, F, and G....Ch. 9 - List the following bonds in order of increasing...Ch. 9 - Classify the following bonds as ionic, polar...Ch. 9 - Classify the following bonds as ionic, polar...Ch. 9 - Summarize the essential features of the Lewis...Ch. 9 - The octet rule applies mainly to the second-period...Ch. 9 - Write Lewis structures for the following molecules...Ch. 9 - Write Lewis structures for the following molecules...Ch. 9 - Write Lewis structures for the following...Ch. 9 - Write Lewis structures for the following...Ch. 9 - The following Lewis structures for (a) HCN, (b)...Ch. 9 - The skeletal structure of acetic acid shown here...Ch. 9 - Prob. 9.49QPCh. 9 - Do formal charges represent actual separation of...Ch. 9 - Write Lewis structures for the following ions: (a)...Ch. 9 - Write Lewis structures for the following ions: (a)...Ch. 9 - Define bond length, resonance, and resonance...Ch. 9 - Is it possible to trap a resonance structure of a...Ch. 9 - Write Lewis structures for the following species,...Ch. 9 - Draw three resonance structures for the chlorate...Ch. 9 - Write three resonance structures for hydrazoic...Ch. 9 - Draw two resonance structures for diazomethane,...Ch. 9 - Draw three resonance structures for the molecule...Ch. 9 - Draw three reasonable resonance structures for the...Ch. 9 - Why does the octet rule not hold for many...Ch. 9 - Give three examples of compounds that do not...Ch. 9 - Because fluorine has seven valence electrons...Ch. 9 - What is a coordinate covalent bond? Is it...Ch. 9 - Prob. 9.65QPCh. 9 - In the vapor phase, beryllium chloride consists of...Ch. 9 - Of the noble gases, only Kr, Xe, and Rn are known...Ch. 9 - Write a Lewis structure for SbCl5. Does this...Ch. 9 - Prob. 9.69QPCh. 9 - Write Lewis structures for the reaction...Ch. 9 - What is bond enthalpy? Bond enthalpies of...Ch. 9 - Explain why the bond enthalpy of a molecule is...Ch. 9 - From the following data, calculate the average...Ch. 9 - For the reaction O(g)+O2(g)O3(g)H=107.2kJ/mol...Ch. 9 - The bond enthalpy of F2(g) is 156.9 kJ/mol....Ch. 9 - For the reaction 2C2H6(g)+7O2(g)4CO2(g)+6H2O(g)...Ch. 9 - Prob. 9.77QPCh. 9 - Which of the following are ionic compounds? Which...Ch. 9 - Prob. 9.79QPCh. 9 - Use ionization energy (see Table 8.2) and electron...Ch. 9 - Prob. 9.82QPCh. 9 - Prob. 9.83QPCh. 9 - Write three reasonable resonance structures for...Ch. 9 - Prob. 9.85QPCh. 9 - Give an example of an ion or molecule containing...Ch. 9 - Draw four reasonable resonance structures for the...Ch. 9 - Prob. 9.88QPCh. 9 - Draw reasonable resonance structures for the...Ch. 9 - Are the following statements true or false? (a)...Ch. 9 - Prob. 9.91QPCh. 9 - Using the following information and the fact that...Ch. 9 - Prob. 9.93QPCh. 9 - Which of the following molecules has the shortest...Ch. 9 - Most organic acids can be represented as RCOOH,...Ch. 9 - Which of the following species are isoelectronic:...Ch. 9 - The following species have been detected in...Ch. 9 - The amide ion, NH2, is a Brnsted base. Represent...Ch. 9 - Draw Lewis structures for the following organic...Ch. 9 - The triiodide ion (I3) in which the I atoms are...Ch. 9 - Compare the bond enthalpy of F2 with the energy...Ch. 9 - Methyl isocyanate (CH3NCO) is used to make certain...Ch. 9 - Prob. 9.103QPCh. 9 - Prob. 9.104QPCh. 9 - Prob. 9.105QPCh. 9 - Draw Lewis structures for the following...Ch. 9 - Prob. 9.107QPCh. 9 - Prob. 9.108QPCh. 9 - Draw Lewis structures for the following organic...Ch. 9 - Write Lewis structures for the following four...Ch. 9 - Prob. 9.111QPCh. 9 - Prob. 9.112QPCh. 9 - Write three resonance structures for (a) the...Ch. 9 - (a) From the following data calculate the bond...Ch. 9 - Prob. 9.115QPCh. 9 - What are the other two reasons for choosing (b) in...Ch. 9 - Prob. 9.117QPCh. 9 - The NO bond distance in nitric oxide is 115 pm,...Ch. 9 - Prob. 9.119QPCh. 9 - Prob. 9.120QPCh. 9 - Prob. 9.121QPCh. 9 - Prob. 9.122QPCh. 9 - Draw a Lewis structure for nitrogen pentoxide...Ch. 9 - In the gas phase, aluminum chloride exists as a...Ch. 9 - The hydroxyl radical (OH) plays an important role...Ch. 9 - Experiments show that it takes 1656 kJ/mol to...Ch. 9 - Calculate Hrxn at 25C of the reaction between...Ch. 9 - Calculate Hrxn at 25C of the reaction between...Ch. 9 - Draw three resonance structures of sulfur dioxide...Ch. 9 - Vinyl chloride (C2H3Cl) differs from ethylene...Ch. 9 - Prob. 9.131QPCh. 9 - The American chemist Robert S. Mulliken suggested...Ch. 9 - Prob. 9.133QPCh. 9 - A student in your class claims that magnesium...Ch. 9 - Shown here is a skeletal structure of borazine...Ch. 9 - Calculate the wavelength of light needed to carry...Ch. 9 - Prob. 9.137QPCh. 9 - From the lattice energy of KCl in Table 9.1 and...Ch. 9 - The species H3+ is the simplest polyatomic ion....Ch. 9 - The bond enthalpy of the CN bond in the amide...Ch. 9 - In 1999 an unusual cation containing only nitrogen...Ch. 9 - Nitroglycerin, one of the most commonly used...Ch. 9 - Give a brief description of the medical uses of...Ch. 9 - Prob. 9.144QPCh. 9 - The isolated O2 ion is unstable so it is not...Ch. 9 - When irradiated with light of wavelength 471.7 nm,...Ch. 9 - Recall from Chapter 8 that the product of the...Ch. 9 - The reaction between fluorine (F2) with ethane...Ch. 9 - A new allotrope of oxygen, O4, has been reported....Ch. 9 - Because bond formation is exothermic, when two...Ch. 9 - Estimate Hf for sodium astatide (NaAt) according...
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