Chemistry: A Molecular Approach
3rd Edition
ISBN: 9780321809247
Author: Nivaldo J. Tro
Publisher: Prentice Hall
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Chapter 18, Problem 119E
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each pair of substrates below, choose the one that will react faster in a substitution reaction, assuming that:
1. the rate of substitution doesn't depend on nucleophile concentration and
2. the products are a roughly 50/50 mixture of enantiomers.
Substrate A
Substrate B
Faster Rate
X
Ś
CI
(Choose one)
(Choose one)
CI
Br
Explanation
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Br
(Choose one)
© 2025 McGraw Hill LLC. All Rights F
NMR spectrum of ethyl acetate has signals whose chemical shifts are indicated below. Which hydrogen or set of hydrogens corresponds to the signal at
4.1 ppm? Select the single best answer.
The
H
O
HỌC—C—0—CH, CH,
2
A
ethyl acetate
H NMR: 1.3 ppm, 2.0 ppm, 4.1 ppm
Check
OA
B
OC
ch
B
C
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Chapter 18 Solutions
Chemistry: A Molecular Approach
Ch. 18 - Prob. 1SAQCh. 18 - Q2. Which statement is true for voltaic cells?
a)...Ch. 18 - Prob. 3SAQCh. 18 - Prob. 4SAQCh. 18 - Prob. 5SAQCh. 18 - Prob. 6SAQCh. 18 - Q7. Use Table 18.1 to calculate G for the...Ch. 18 - Prob. 8SAQCh. 18 - Prob. 9SAQCh. 18 - Prob. 10SAQ
Ch. 18 - Prob. 11SAQCh. 18 - Prob. 12SAQCh. 18 - Prob. 13SAQCh. 18 - Prob. 14SAQCh. 18 - Q15. Which metal can be used as a sacrificial...Ch. 18 - 1. In electrochemistry, spontaneous redox...Ch. 18 - Prob. 2ECh. 18 - Prob. 3ECh. 18 - Prob. 4ECh. 18 - Prob. 5ECh. 18 - Prob. 6ECh. 18 - Prob. 7ECh. 18 - Prob. 8ECh. 18 - Prob. 9ECh. 18 - Prob. 10ECh. 18 - Prob. 11ECh. 18 - Prob. 12ECh. 18 - Prob. 13ECh. 18 - Prob. 14ECh. 18 - 15. Is a spontaneous redox reaction obtained by...Ch. 18 - 16. How can Table 19.1 be used to predict whether...Ch. 18 - 17. Explain why , , and K are all interrelated.
Ch. 18 - Prob. 18ECh. 18 - Prob. 19ECh. 18 - Prob. 20ECh. 18 - Prob. 21ECh. 18 - Prob. 22ECh. 18 - 23. What are the anode and cathode reactions in a...Ch. 18 - Prob. 24ECh. 18 - 25. What is a fuel cell? What is the most common...Ch. 18 - Prob. 26ECh. 18 - 27. List some applications of electrolysis.
Ch. 18 - Prob. 28ECh. 18 - 29. What species is oxidized, and what species is...Ch. 18 - Prob. 30ECh. 18 - Prob. 31ECh. 18 - Prob. 32ECh. 18 - Prob. 33ECh. 18 - Prob. 34ECh. 18 - Prob. 35ECh. 18 - Prob. 36ECh. 18 - Balance each redox reaction occurring in acidic...Ch. 18 - 38. Balance each redox reaction occurring in...Ch. 18 - Prob. 39ECh. 18 - Prob. 40ECh. 18 - 41. Balance each redox reaction occurring in basic...Ch. 18 - Prob. 42ECh. 18 - 43. Sketch a voltaic cell for each redox reaction....Ch. 18 - 44. Sketch a voltaic cell for each redox reaction....Ch. 18 - Prob. 45ECh. 18 - Prob. 46ECh. 18 - 47. Consider the voltaic cell:
a. Determine the...Ch. 18 - 48. Consider the voltaic cell:
a. Determine the...Ch. 18 - 49. Use line notation to represent each...Ch. 18 - 50. Use line notation to represent each...Ch. 18 - Make a sketch of the voltaic cell represented by...Ch. 18 - 52. Make a sketch of the voltaic cell represented...Ch. 18 - 53. Determine whether or not each redox reaction...Ch. 18 - 54. Determine whether or not each redox reaction...Ch. 18 - 55. Which metal could you use to reduce Mn2+ ions...Ch. 18 - Prob. 56ECh. 18 - Prob. 57ECh. 18 - Prob. 58ECh. 18 - Prob. 59ECh. 18 - Prob. 60ECh. 18 - Prob. 61ECh. 18 - 62. Calculate for each balanced redox reaction...Ch. 18 - Prob. 63ECh. 18 - 64. Which metal is the best reducing agent?
a....Ch. 18 - 65. Use tabulated electrode potentials to...Ch. 18 - Prob. 66ECh. 18 - 67. Calculate the equilibrium constant for each of...Ch. 18 - 68. Calculate the equilibrium constant for each of...Ch. 18 - Prob. 69ECh. 18 - Prob. 70ECh. 18 - Prob. 71ECh. 18 - 72. Calculate and for a redox reaction with n =...Ch. 18 - 73. A voltaic cell employs the following redox...Ch. 18 - 74. A voltaic cell employs the redox reaction:
2...Ch. 18 - 75. An electrochemical cell is based on these two...Ch. 18 - Prob. 76ECh. 18 - 77. A voltaic cell consists of a Zn/Zn2+ half-cell...Ch. 18 - 78. A voltaic cell consists of a Pb/Pb2+ half-cell...Ch. 18 - Prob. 79ECh. 18 - Prob. 80ECh. 18 - 81. A concentration cell consists of two Sn/Sn2+...Ch. 18 - Prob. 82ECh. 18 - 83. Determine the optimum mass ratio of Zn to MnO2...Ch. 18 - 84. What mass of lead sulfate is formed in a...Ch. 18 - 85. Refer to the tabulated values of in Appendix...Ch. 18 - 86. Refer to the tabulated values of in Appendix...Ch. 18 - Prob. 87ECh. 18 - Prob. 88ECh. 18 - Prob. 89ECh. 18 - Prob. 90ECh. 18 - 91. Write equations for the half-reactions that...Ch. 18 - Prob. 92ECh. 18 - 93. Write equations for the half-reactions that...Ch. 18 - 94. What products are obtained in the electrolysis...Ch. 18 - 95. Write equations for the half-reactions that...Ch. 18 - Prob. 96ECh. 18 - 97. Make a sketch of an electrolysis cell that...Ch. 18 - Prob. 98ECh. 18 - Prob. 99ECh. 18 - Prob. 100ECh. 18 - Prob. 101ECh. 18 - Prob. 102ECh. 18 - 105103. Consider the unbalanced redox...Ch. 18 - Prob. 104ECh. 18 - 107. Consider the molecular views of an Al strip...Ch. 18 - 106. Consider the molecular view of an...Ch. 18 - Prob. 107ECh. 18 - Prob. 108ECh. 18 - Prob. 109ECh. 18 - Prob. 110ECh. 18 - Prob. 111ECh. 18 - Prob. 112ECh. 18 - Prob. 113ECh. 18 - Prob. 114ECh. 18 - Prob. 115ECh. 18 - Prob. 116ECh. 18 - 119. The Ksp of CuI is 1.1 × 10–12. Find Ecell for...Ch. 18 - 120. The Ksp of Zn(OH)2 is 1.8 × 10–14. Find Ecell...Ch. 18 - 121. Calculate and K for each reaction.
a. The...Ch. 18 - Prob. 120ECh. 18 - Prob. 121ECh. 18 - Prob. 122ECh. 18 - Prob. 123ECh. 18 - Prob. 124ECh. 18 - Prob. 125ECh. 18 - Prob. 126ECh. 18 - Prob. 127ECh. 18 - 130. To what pH should you adjust a standard...Ch. 18 - 131. Suppose a hydrogen–oxygen fuel-cell generator...Ch. 18 - 132. A voltaic cell designed to measure [Cu2+] is...Ch. 18 - 133. The surface area of an object to be gold...Ch. 18 - Prob. 132ECh. 18 - Prob. 133ECh. 18 - Prob. 134ECh. 18 - Prob. 135ECh. 18 - Prob. 136ECh. 18 - Prob. 137ECh. 18 - 140. A redox reaction employed in an...Ch. 18 - 141. A redox reaction has an equilibrium constant...
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- How many signals do you expect in the H NMR spectrum for this molecule? Br Br Write the answer below. Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H atoms that would contribute to the same signal as the H already highlighted red Note for advanced students: In this question, any multiplet is counted as one signal. 1 Number of signals in the 'H NMR spectrum. For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to the same signal as the H atom already highlighted red. If no other H atoms will contribute, check the box at right. Check For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute to the same signal as the H atom already highlighted red. If no other H atoms will contribute, check the box at right. O ✓ No additional Hs to color in top molecule ง No additional Hs to color in bottom…arrow_forwardin the kinetics experiment, what were the values calculated? Select all that apply.a) equilibrium constantb) pHc) order of reactiond) rate contstantarrow_forwardtrue or false, given that a 20.00 mL sample of NaOH took 24.15 mL of 0.141 M HCI to reach the endpoint in a titration, the concentration of the NaOH is 1.17 M.arrow_forward
- in the bromothymol blue experiment, pKa was measured. A closely related compound has a Ka of 2.10 x 10-5. What is the pKa?a) 7.1b) 4.7c) 2.0arrow_forwardcalculate the equilibrium concentration of H2 given that K= 0.017 at a constant temperature for this reaction. The inital concentration of HBr is 0.050 M.2HBr(g) ↔ H2(g) + Br2(g)a) 4.48 x 10-2 M b) 5.17 x 10-3 Mc) 1.03 x 10-2 Md) 1.70 x 10-2 Marrow_forwardtrue or falsegiven these two equilibria with their equilibrium constants:H2(g) + CI2(l) ↔ 2HCI(g) K= 0.006 CI2(l) ↔ CI2(g) K= 0.30The equilibrium contstant for the following reaction is 1.8H2(g) + CI2 ↔ 2HCI(g)arrow_forward
- I2(g) + CI2(g) ↔ 2ICIK for this reaction is 81.9. Find the equilibrium concentration of I2 if the inital concentration of I2 and CI2 are 0.010 Marrow_forwardtrue or false,the equilibrium constant for this reaction is 0.50.PCI5(g) ↔ PCI3(g) + CI2(g)Based on the above, the equilibrium constant for the following reaction is 0.25.2PCI5(g) ↔. 2PCI3(g) + 2CI2(g)arrow_forwardtrue or false, using the following equilibrium, if carbon dioxide is added the equilibrium will shift toward the productsC(s) + CO2(g) ↔ 2CO(g)arrow_forward
- 2S2O2/3- (aq) + I2 (aq) ---> S4O2/6- (aq) +2I- (aq) Experiment I2 (M) S2O3- (M) Initital Rate (M/s) 1 0.01 0.01 0.0004 2 0.01 0.02 0.0004 3 0.02 0.01 0.0008 Calculate the overall order for this reaction using the table data a) 3b) 0c) 2d) 1arrow_forwardthe decomposition of N2O5 is the first order with a half-life of 1.98 minutes. If the inital concentration of N2O5 is 0.200 M, what is the concentration after 6 minutes?a) 0.612 Mb) 0.035 Mc) 0.024 Md) 0.100 Marrow_forward20.00 mL of 0.150 M HCI is titrated with 0.075 M NaOH. What volume of NaOH is needed?a) 50 mLb) 20 mLc) 40 mLd) 26.66 mLarrow_forward
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