Masteringchemistry With Pearson Etext -- Valuepack Access Card -- For Principles Of Chemistry: A Molecular Approach
3rd Edition
ISBN: 9780133890686
Author: Tro
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Chapter 18, Problem 36E
Interpretation Introduction
Interpretation: The ways by which the corrosion of iron is prevented are to be listed.
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Students have asked these similar questions
On the next page is an LC separation of the parabens found in baby wash. Parabens are
suspected in a link to breast cancer therefore an accurate way to quantitate them is desired.
a. In the chromatogram, estimate k' for ethyl paraben. Clearly indicate what values you used for
all the terms in your calculation.
b. Is this a "good" value for a capacity factor? Explain.
c. What is the resolution between n-Propyl paraben and n-Butyl paraben? Again, indicate clearly
what values you used in your calculation.
MAU
| Methyl paraben
40
20
0
-2
Ethyl paraben n-Propyl paraben
n-Butyl paraben
App ID 22925
6
8
min
d. In Figure 4, each stationary phase shows some negative correlation between plate count
and retention factor. In other words, as k' increases, N decreases. Explain this relationship
between k' and N.
Plate Count (N)
4000
3500
2500
2000
1500
1000
Figure 4. Column efficiency (N) vs retention factor (k') for 22
nonionizable solutes on FMS (red), PGC (black), and COZ (green). 3000
Eluent compositions (acetonitrile/water, A/W) were adjusted to obtain
k' less than 15, which was achieved for most solutes as follows: FMS
(30/70 A/W), PGC (60/40), COZ (80/20). Slightly different
compositions were used for the most highly retained solutes. All
columns were 50 mm × 4.6 mm id and packed with 5 um particles,
except for COZ, which was packed with 3 um particles. All other
chromatographic conditions were constant: column length 5 cm,
column j.§. 4.6 mm, flow rate 2 mL/min, column temperature 40 °C,
and injection volume 0.5 μL
Log(k'x/K'ethylbenzene)
FMS
1.5
1.0
0.5
0.0
ཐྭ ཋ ཤྩ བྷྲ ;
500
0
5
10…
f. Predict how the van Deemter curve in Figure 7
would change if the temperature were raised
from 40 °C to 55 °C.
Figure 7. van Desmter curves in reduced coordinates for four
nitroalkane homologues (nitropropane, black; nitrobutane, red;
nitropentane, blue; and nitrohexane, green) separated on the FMS
phase. Chromatographic conditions: column dimensions 50 mm × 4.6
mm id, eluent 30/70 ACN/water, flow rates 0.2-5.0 mL/min, injection
volume 0.5 and column temperature 40 °C. No corrections to the
plate heights have been made to account for extracolumn dispersion.
Reduced Plate Height (h)
°
20
40
60
Reduced Velocity (v)
8. (2) A water sample is analyzed for traces of benzene using headspace analysis. The sample and
standard are spiked with a fixed amount of toluene as an internal standard. The following data are
obtained:
Ppb benzene
Peak area benzene
Peak area toluene
10.0
252
376
Sample
533
368
What is the concentration of benzene in the sample?
Chapter 18 Solutions
Masteringchemistry With Pearson Etext -- Valuepack Access Card -- For Principles Of 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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