Chemistry a Molecular Approach
3rd Edition
ISBN: 9780133099942
Author: Nivaldo J. Tro
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 12SAQ
Q12. A Lewis structure for the acetate ion is shown here:
Which structure is the best resonance structure for the acetate ion?
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Chemistry a Molecular Approach
Ch. 9 - Prob. 1SAQCh. 9 - Q2. Which set of elements is arranged in order of...Ch. 9 - Q3. Which is the correct Lewis structure for...Ch. 9 - Q4. Which compound is likely to have an incomplete...Ch. 9 - Q5. Which compound has the highest magnitude of...Ch. 9 - Prob. 6SAQCh. 9 - Prob. 7SAQCh. 9 - Prob. 8SAQCh. 9 - Prob. 9SAQCh. 9 - Prob. 10SAQ
Ch. 9 - Q11. Determine the formal charge of nitrogen in...Ch. 9 - Q12. A Lewis structure for the acetate ion is...Ch. 9 - Q13. Use formal charge to choose the best Lewis...Ch. 9 - Prob. 14SAQCh. 9 - Prob. 15SAQCh. 9 - Prob. 1ECh. 9 - Prob. 2ECh. 9 - Prob. 3ECh. 9 - Prob. 4ECh. 9 - 5. Describe the octet rule in the Lewis model.
Ch. 9 - 6. According to the Lewis model, what is a...Ch. 9 - 7. How do you draw an ionic Lewis structure?
Ch. 9 - 8. How can Lewis structures be used to determine...Ch. 9 - Prob. 9ECh. 9 - Prob. 10ECh. 9 - Prob. 11ECh. 9 - Prob. 12ECh. 9 - Prob. 13ECh. 9 - Prob. 14ECh. 9 - 15. In a covalent Lewis structure, what is the...Ch. 9 - Prob. 16ECh. 9 - 17. How does the Lewis model for covalent bonding...Ch. 9 - 18. How does the Lewis model for covalent bonding...Ch. 9 - 19. What is electronegativity? What are the...Ch. 9 - Prob. 20ECh. 9 - 21. Explain percent ionic character of a bond. Do...Ch. 9 - 22. What is a dipole moment?
Ch. 9 - Prob. 23ECh. 9 - Prob. 24ECh. 9 - Prob. 25ECh. 9 - 26. What are resonance structures? What is a...Ch. 9 - 27. Do resonance structures always contribute...Ch. 9 - 28. What is formal charge? How is formal charge...Ch. 9 - 29. Why does the octet rule have exceptions? List...Ch. 9 - 30. Which elements can have expanded octets? Which...Ch. 9 - Prob. 31ECh. 9 - Prob. 32ECh. 9 - 33. What is the electron sea model for bonding in...Ch. 9 - Prob. 34ECh. 9 - 35. Write the electron configuration for N. Then...Ch. 9 - 36. Write the electron configuration for Ne. Then...Ch. 9 - 37. Write the Lewis symbol for each atom or...Ch. 9 - 38. Write the Lewis symbol for each atom or...Ch. 9 - 39. Write the Lewis symbols for the ions in each...Ch. 9 - 40. Write the Lewis symbols for the ions in each...Ch. 9 - 41. Use Lewis symbols to determine the formula for...Ch. 9 - 42. Use Lewis symbols to determine the formula for...Ch. 9 - 43. Explain the trend in the lattice energies of...Ch. 9 - 44. Rubidium iodide has a lattice energy of –617...Ch. 9 - Prob. 45ECh. 9 - 46. Arrange these compounds in order of increasing...Ch. 9 - 47. Use the Born–Haber cycle and data from...Ch. 9 - 48. Use the Born–Haber cycle and data from...Ch. 9 - 49. Use covalent Lewis structures to explain why...Ch. 9 - 50. Use covalent Lewis structures to explain why...Ch. 9 - 51. Write the Lewis structure for each...Ch. 9 - Prob. 52ECh. 9 - 53. Write the Lewis structure for each...Ch. 9 - 54. Write the Lewis structure for each...Ch. 9 - 55. Determine if a bond between each pair of atoms...Ch. 9 - 56. Determine if a bond between each pair of atoms...Ch. 9 - 57. Draw the Lewis structure for CO with an arrow...Ch. 9 - 58. Draw the Lewis structure for BrF with an arrow...Ch. 9 - 59. Write the Lewis structure for each molecule or...Ch. 9 - 60. Write the Lewis structure for each molecule or...Ch. 9 - 61. Write the Lewis structure for each molecule or...Ch. 9 - 62. Write the Lewis structure for each molecule or...Ch. 9 - 63. Write a Lewis structure that obeys the octet...Ch. 9 - 64. Write a Lewis structure that obeys the octet...Ch. 9 - 65. Use formal charge to identify the better Lewis...Ch. 9 - 66. Use formal charges to identify the better...Ch. 9 - 67. How important is the resonance structure shown...Ch. 9 - 68. In N2O, nitrogen is the central atom and the...Ch. 9 - 69. Draw the Lewis structure (including resonance...Ch. 9 - 70. Draw the Lewis structure (including resonance...Ch. 9 - 71. What are the formal charges of the atoms shown...Ch. 9 - 72. What are the formal charges of the atoms shown...Ch. 9 - 73. Write the Lewis structure for each molecule...Ch. 9 - 74. Write the Lewis structure for each molecule...Ch. 9 - 75. Write the Lewis structure for each ion....Ch. 9 - 76. Write Lewis structures for each molecule or...Ch. 9 - 77. Write Lewis structures for each molecule or...Ch. 9 - 78. Write Lewis structures for each molecule or...Ch. 9 - 79. Order these compounds in order of increasing...Ch. 9 - 80. Which compound shown here has the stronger...Ch. 9 - 81. Hydrogenation reactions are used to add...Ch. 9 - 82. Ethanol is a possible fuel. Use average bond...Ch. 9 - 83. Hydrogen, a potential future fuel, can be...Ch. 9 - 84. In the Chemistry and the Environment box on...Ch. 9 - 85. Write an appropriate Lewis structure for each...Ch. 9 - 86. Write an appropriate Lewis structure for each...Ch. 9 - 87. Each compound contains both ionic and covalent...Ch. 9 - 88. Each compound contains both ionic and covalent...Ch. 9 - 89. Carbon ring structures are common in organic...Ch. 9 - 90. Amino acids are the building blocks of...Ch. 9 - 91. Formic acid is responsible for the sting of...Ch. 9 - 92. Diazomethane is a highly poisonous, explosive...Ch. 9 - 93. The reaction of Fe2O3(s) with Al(s) to form...Ch. 9 - Prob. 94ECh. 9 - 95. Draw the Lewis structure for nitric acid (the...Ch. 9 - 96. Phosgene (Cl2CO) is a poisonous gas used as a...Ch. 9 - 97. The cyanate ion (OCN–) and the fulminate ion...Ch. 9 - Prob. 98ECh. 9 - Prob. 99ECh. 9 - 100. Use Lewis structures to explain why Br3– and...Ch. 9 - 101. Draw the Lewis structure for HCSNH2. (The...Ch. 9 - 102. Draw the Lewis structure for urea, H2NCONH2,...Ch. 9 - 103. Some theories of aging suggest that free...Ch. 9 - 104. Free radicals are important in many...Ch. 9 - Prob. 105ECh. 9 - 106. Calculate ΔHrxn for the combustion of octane...Ch. 9 - 107. Draw the Lewis structure for each...Ch. 9 - Prob. 108ECh. 9 - Prob. 109ECh. 9 - 110. Calculate for the reaction using the bond...Ch. 9 - Prob. 111ECh. 9 - Prob. 112ECh. 9 - 113. A compound composed of only carbon and...Ch. 9 - Prob. 114ECh. 9 - 115. The main component of acid rain (H2SO4) forms...Ch. 9 - 116. A 0.167-g sample of an unknown acid requires...Ch. 9 - Prob. 117ECh. 9 - Prob. 118ECh. 9 - Prob. 119ECh. 9 - 120. The standard heat of formation of CaBr2 is...Ch. 9 - Prob. 121ECh. 9 - Prob. 122ECh. 9 - Prob. 123ECh. 9 - Prob. 124ECh. 9 - Prob. 125ECh. 9 - 126. Which statement is true of an endothermic...Ch. 9 - Prob. 127ECh. 9 - Prob. 128ECh. 9 - Prob. 129E
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- Hydrogenation reactions, which involve the addition of H2 to a molecule, are widely used in industry to transform one compound into another. For example, 1-butene (C4H8) is converted to butane (C4H10) by addition of H2. Use the bond dissociation enthalpies in Table 8.8 to estimate the enthalpy change for this hydrogenation reaction.arrow_forwardDinitrogen monoxide, N2O, can decompose to nitrogen and oxygen gas: 2 N2O(g) 2 N2(g) + O2(g) Use bond dissociation enthalpies to estimate the enthalpy change for this reaction.arrow_forwardCompare your answers from parts a and b of Exercise 69 of Chapter 3 with H values calculated for each reaction using standard enthalpies of formation in Appendix 4. Do enthalpy changes calculated from bond energies give a reasonable estimate of the actual values?arrow_forward
- When a reaction is exothermic, is the sum of bond energies of products or of reactants greater?arrow_forwardAn important observation supporting the concept of resonance in the localized electron model was that there are only three different structures of dichlorobenzene (C6H4C10). How does this fact support the concept of resonance (see Exercise 89)?arrow_forwardIn general the higher the charge on the ions in an ionic compound, the more favorable the lattice energy. Why do some stable ionic compounds have +1 charged ions even though +4, + 5, and +6 charged ions would have a more favorable lattice energy?arrow_forward
- Using the bond dissociation enthalpies in Table 8.8, estimate the enthalpy of combustion of gaseous methane, CH4, to give water vapor and carbon dioxide gas.arrow_forwardWrite all resonance structures of chlorobenzene, C6H5Cl, a molecule with the same cyclic structure as benzene. In all structures, keep the CCl bond as a single bond. Which resonance structures are the most important?arrow_forwardCompare your answers from parts a and b of Exercise 69 with H values calculated for each reaction using standard enthalpies of formation in Appendix 4. Do enthalpy changes calculated from bond energies give a reasonable estimate of the actual values?arrow_forward
- A common trait of simple organic compounds is to have Lewis structures where all atoms have a formal charge of zero. Consider the following incomplete Lewis structure for an organic compound called methyl cyanoacrylate, the main ingredient in Super Glue. Draw a complete Lewis structure for methyl cyanoacrylate in which all atoms have a formal charge of zero.arrow_forwardBond Enthalpy When atoms of the hypothetical element X are placed together, they rapidly undergo reaction to form the X2 molecule: X(g)+X(g)X2(g) a Would you predict that this reaction is exothermic or endothermic? Explain. b Is the bond enthalpy of X2 a positive or a negative quantity? Why? c Suppose H for the reaction is 500 kJ/mol. Estimate the bond enthalpy of the X2 molecule. d Another hypothetical molecular compound, Y2(g), has a bond enthalpy of 750 kJ/mol, and the molecular compound XY(g) has a bond enthalpy of 1500 kJ/mol. Using bond enthalpy information, calculate H for the following reaction. X2(g)+Y2(g)2XY(g) e Given the following information, as well as the information previously presented, predict whether or not the hypothetical ionic compound AX is likely to form. In this compound, A forms the A+ cation, and X forms the X anion. Be sure to justify your answer. Reaction: A(g)+12X2(g)AX(s)The first ionization energy of A(g) is 400 kJ/mol. The electron affinity of X(g) is 525 kJ/mol. The lattice energy of AX(s) is 100 kJ/mol. f If you predicted that no ionic compound would form from the reaction in Part e, what minimum amount of AX(s) lattice energy might lead to compound formation?arrow_forwardGiven the bonds C N, C H, C Br, and S O, (a) which atom in each is the more electronegative? (b) which of these bonds is the most polar?arrow_forward
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