Chemistry: A Molecular Approach (4th Edition)
4th Edition
ISBN: 9780134112831
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 17, Problem 153E
Interpretation Introduction
Interpretation: The solubility of
in a
in a
in a
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(a
4 shows scanning electron microscope (SEM) images of extruded
actions of packing bed for two capillary columns of different diameters,
al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the
same stationary phase, spherical particles with 1-um diameter.
A) When the columns were prepared, the figure shows that the column with
the larger diameter has more packing irregularities. Explain this observation.
B) Predict what affect this should have on band broadening and discuss your
prediction using the van Deemter terms.
C) Does this figure support your explanations in application question 33?
Explain why or why not and make any changes in your answers in light of
this figure.
Figure 4 SEM images of
sections of packed columns
for a) 750 and b) 30-um-i.d.
capillary columns.³
fcrip
= ↓ bandwidth Il temp
32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual
components of the van Deemter equation and consequently, band broadening?
Increase temperature
Longer column
Using a gas mobile phase
instead of liquid
Smaller particle stationary phase
Multiple Paths
Diffusion
Mass Transfer
34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.).
A) Predict whether decreasing the column inner diameters increase or decrease bandwidth.
B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or
decreasing bandwidth as a function of i.d. and justify your answer.
Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was
obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles.
35
20
H(um)
큰 20
15
90
0+
1500
100
75
550
01
02
594
05
μ(cm/sec)
30
15
10
Chapter 17 Solutions
Chemistry: A Molecular Approach (4th Edition)
Ch. 17 - Prob. 1SAQCh. 17 - Q2. What is the pH of a buffer that is 0.120 M in...Ch. 17 - Q3. A buffer with a pH of 9.85 contains CH3NH2 and...Ch. 17 - Q4. A 500.0-mL buffer solution is 0.10 M in...Ch. 17 - Q5. Consider a buffer composed of the weak acid HA...Ch. 17 - Q6. Which combination is the best choice to...Ch. 17 - Q7. A 25.0-mL sample of an unknown HBr solution is...Ch. 17 - Q8. A 10.0-mL sample of 0.200 M hydrocyanic acid...Ch. 17 - Q9. A 20.0-mL sample of 0.150 M ethylamine is...Ch. 17 - Q10. Three 15.0-mL acid samples—0.10 M HA, 0.10 M...
Ch. 17 - Q11. A weak unknown monoprotic acid is titrated...Ch. 17 - Q12. Calculate the molar solubility of lead(II)...Ch. 17 - Q13. Calculate the molar solubility of magnesium...Ch. 17 - Q14. A solution is 0.025 M in Pb2 +. What minimum...Ch. 17 - Q15. Which compound is more soluble in an acidic...Ch. 17 - 1. What is the pH range of human blood? How is...Ch. 17 - 2. What is a buffer? How does a buffer work? How...Ch. 17 - 3. What is the common ion effect?
Ch. 17 - 4. What is the Henderson–Hasselbalch equation, and...Ch. 17 - 5. What is the pH of a buffer solution when the...Ch. 17 - 6. Suppose that a buffer contains equal amounts of...Ch. 17 - 7. How do you use the Henderson–Hasselbalch...Ch. 17 - 8. What factors influence the effectiveness of a...Ch. 17 - 9. What is the effective pH range of a buffer...Ch. 17 - 10. Describe acid–base titration. What is the...Ch. 17 - 11. The pH at the equivalence point of the...Ch. 17 - 12. The volume required to reach the equivalence...Ch. 17 - 13. In the titration of a strong acid with a...Ch. 17 - 14. In the titration of a weak acid with a strong...Ch. 17 - 15. The titration of a polyprotic acid with...Ch. 17 - 16. In the titration of a polyprotic acid, the...Ch. 17 - 17. What is the difference between the endpoint...Ch. 17 - 18. What is an indicator? How can an indicator...Ch. 17 - 19. What is the solubility product constant? Write...Ch. 17 - 20. What is molar solubility? How can you obtain...Ch. 17 - 21. How does a common ion affect the solubility of...Ch. 17 - 22. How is the solubility of an ionic compound...Ch. 17 - 23. For a given solution containing an ionic...Ch. 17 - 24. What is selective precipitation? Under which...Ch. 17 - 25. What is qualitative analysis? How does...Ch. 17 - 26. What are the main groups in the general...Ch. 17 - 27. In which of these solutions will HNO2 ionize...Ch. 17 - 28. A formic acid solution has a pH of 3.25. Which...Ch. 17 - 29. Solve an equilibrium problem (using an ICE...Ch. 17 - 30. Solve an equilibrium problem (using an ICE...Ch. 17 - 31. Calculate the percent ionization of a 0.15 M...Ch. 17 - 32. Calculate the percent ionization of a 0.13 M...Ch. 17 - 33. Solve an equilibrium problem (using an ICE...Ch. 17 - 34. Solve an equilibrium problem (using an ICE...Ch. 17 - 35. A buffer contains significant amounts of...Ch. 17 - 36. A buffer contains significant amounts of...Ch. 17 - Prob. 37ECh. 17 - Prob. 38ECh. 17 - 39. Use the Henderson–Hasselbalch equation to...Ch. 17 - 40. Use the Henderson–Hasselbalch equation to...Ch. 17 - 41. Calculate the pH of the solution that results...Ch. 17 - 42. Calculate the pH of the solution that results...Ch. 17 - 43. Calculate the ratio of NaF to HF required to...Ch. 17 - 44. Calculate the ratio of CH3NH2 to CH3NH3Cl...Ch. 17 - Prob. 45ECh. 17 - 46. What mass of ammonium chloride should you add...Ch. 17 - 47. A 250.0-mL buffer solution is 0.250 M in...Ch. 17 - 48. A 100.0-mL buffer solution is 0.175 M in HClO...Ch. 17 - Prob. 49ECh. 17 - 50. For each solution, calculate the initial and...Ch. 17 - Prob. 51ECh. 17 - 52. A 100.0-mL buffer solution is 0.100 M in NH3...Ch. 17 - 53. Determine whether or not the mixing of each...Ch. 17 - 54. Determine whether or not the mixing of each...Ch. 17 - 55. Blood is buffered by carbonic acid and the...Ch. 17 - 56. The fluids within cells are buffered by H2PO4–...Ch. 17 - 57. Which buffer system is the best choice to...Ch. 17 - Prob. 58ECh. 17 - 59. A 500.0-mL buffer solution is 0.100 M in HNO2...Ch. 17 - Prob. 60ECh. 17 - Prob. 61ECh. 17 - 62. Two 25.0-mL samples, one 0.100 M HCl and the...Ch. 17 - 63. Two 20.0-mL samples, one 0.200 M KOH and the...Ch. 17 - 64. The graphs labeled (a) and (b) show the...Ch. 17 - 65. Consider the curve shown here for the...Ch. 17 - 66. Consider the curve shown here for the...Ch. 17 - 67. Consider the titration of a 35.0-mL sample of...Ch. 17 - Prob. 68ECh. 17 - 69. Consider the titration of a 25.0-mL sample of...Ch. 17 - Prob. 70ECh. 17 - 71. Consider the titration of a 20.0-mL sample of...Ch. 17 - Prob. 72ECh. 17 - Prob. 73ECh. 17 - Prob. 74ECh. 17 - Prob. 75ECh. 17 - Prob. 76ECh. 17 - Prob. 77ECh. 17 - 78. A 0.446-g sample of an unknown monoprotic acid...Ch. 17 - Prob. 79ECh. 17 - Prob. 80ECh. 17 - Prob. 81ECh. 17 - Prob. 82ECh. 17 - Prob. 83ECh. 17 - 84. Referring to Table 17.1, pick an indicator for...Ch. 17 - Prob. 85ECh. 17 - Prob. 86ECh. 17 - 87. Refer to the Ksp values in Table 17.2 to...Ch. 17 - 88. Refer to the Ksp values in Table 17.2 to...Ch. 17 - 89. Use the given molar solubilities in pure water...Ch. 17 - Prob. 90ECh. 17 - Prob. 91ECh. 17 - Prob. 92ECh. 17 - 93. Refer to the Ksp value from Table 17.2 to...Ch. 17 - Prob. 94ECh. 17 - 95. Calculate the molar solubility of barium...Ch. 17 - Prob. 96ECh. 17 - Prob. 97ECh. 17 - Prob. 98ECh. 17 - Prob. 99ECh. 17 - Prob. 100ECh. 17 - Prob. 101ECh. 17 - Prob. 102ECh. 17 - Prob. 103ECh. 17 - Prob. 104ECh. 17 - Prob. 105ECh. 17 - Prob. 106ECh. 17 - Prob. 107ECh. 17 - Prob. 108ECh. 17 - Prob. 109ECh. 17 - Prob. 110ECh. 17 - Prob. 111ECh. 17 - Prob. 112ECh. 17 - 113. A 150.0-mL solution contains 2.05 g of sodium...Ch. 17 - Prob. 114ECh. 17 - Prob. 115ECh. 17 - Prob. 116ECh. 17 - Prob. 117ECh. 17 - 118. A 250.0-mL buffer solution initially contains...Ch. 17 - 119. In analytical chemistry, bases used for...Ch. 17 - Prob. 120ECh. 17 - Prob. 121ECh. 17 - Prob. 122ECh. 17 - Prob. 123ECh. 17 - Prob. 124ECh. 17 - Prob. 125ECh. 17 - Prob. 126ECh. 17 - Prob. 127ECh. 17 - Prob. 128ECh. 17 - Prob. 129ECh. 17 - Prob. 130ECh. 17 - 131. The Kb of hydroxylamine, NH2OH, is 1.10 ×...Ch. 17 - 132. A 0.867-g sample of an unknown acid requires...Ch. 17 - Prob. 133ECh. 17 - Prob. 134ECh. 17 - 135. What relative masses of dimethyl amine and...Ch. 17 - Prob. 136ECh. 17 - Prob. 137ECh. 17 - Prob. 138ECh. 17 - 139. Since soap and detergent action is hindered...Ch. 17 - 140. A 0.558-g sample of a diprotic acid with a...Ch. 17 - 141. When excess solid Mg(OH)2 is shaken with 1.00...Ch. 17 - Prob. 142ECh. 17 - Prob. 143ECh. 17 - Prob. 144ECh. 17 - Prob. 145ECh. 17 - Prob. 146ECh. 17 - Prob. 147ECh. 17 - 148. What amount of HCl gas must be added to 1.00...Ch. 17 - 149. Without doing any calculations, determine if...Ch. 17 - 150. A buffer contains 0.10 mol of a weak acid and...Ch. 17 - Prob. 151ECh. 17 - Prob. 152ECh. 17 - Prob. 153ECh. 17 - Prob. 154ECh. 17 - Prob. 155QGWCh. 17 - Prob. 156QGWCh. 17 - Prob. 157QGWCh. 17 - 158. A certain town gets its water from an...Ch. 17 - Prob. 159QGWCh. 17 - Buffers and Hydroponics
160. Hydroponics is a...
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