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Chapter 13, Problem 15SAQ
Interpretation Introduction

Introduction: The rate of a chemical reaction depends on the concentration of reactants.

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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 13 Solutions

Chemistry: A Molecular Approach & Student Solutions Manual for Chemistry: A Molecular Approach, Books a la Carte Edition Package

Ch. 13 - Q11. The mechanism shown is proposed for the gas...Ch. 13 - Q12. Which statement is true regarding the...Ch. 13 - Q13. These images represent the first-order...Ch. 13 - Prob. 14SAQCh. 13 - Prob. 15SAQCh. 13 - Prob. 1ECh. 13 - Prob. 2ECh. 13 - Prob. 3ECh. 13 - 4. Why is the reaction rate for reactants defined...Ch. 13 - Prob. 5ECh. 13 - Prob. 6ECh. 13 - Prob. 7ECh. 13 - 8. For a reaction with multiple reactants, how is...Ch. 13 - 9. Explain the difference between the rate law for...Ch. 13 - 10. Write integrated rate laws for zero-order,...Ch. 13 - Prob. 11ECh. 13 - 12. How do reaction rates typically depend on...Ch. 13 - Prob. 13ECh. 13 - 14. What is an Arrhenius plot? Explain the...Ch. 13 - Prob. 15ECh. 13 - Prob. 16ECh. 13 - 17. In a reaction mechanism, what is an elementary...Ch. 13 - 18. What are the two requirements for a proposed...Ch. 13 - 19. What is an intermediate within a reaction...Ch. 13 - Prob. 20ECh. 13 - 21. Explain the difference between homogeneous...Ch. 13 - Prob. 22ECh. 13 - Prob. 23ECh. 13 - Prob. 24ECh. 13 - 25. Consider the reaction: 2 HBr(g) → H2(g) +...Ch. 13 - 26. Consider the reaction: 2 N2O(g) → 2 N2(g) +...Ch. 13 - 27. For the reaction 2 A(g) + B(g) → 3 C(g), a....Ch. 13 - 28. For the reaction A(g) + B(g) → 2 C(g), a....Ch. 13 - 29. Consider the reaction: Cl2(g) + 3 F2(g) → 2...Ch. 13 - Prob. 30ECh. 13 - Prob. 31ECh. 13 - Prob. 32ECh. 13 - 33. Consider the reaction: H2(g) + Br2(g) ? 2...Ch. 13 - 34. Consider the reaction: 2 H2O2(aq) ? 2 H2O(l) +...Ch. 13 - Prob. 35ECh. 13 - Prob. 36ECh. 13 - Prob. 37ECh. 13 - 38. This reaction is first order in N2O5: N2O5(g)...Ch. 13 - Prob. 39ECh. 13 - Prob. 40ECh. 13 - Prob. 41ECh. 13 - 42. Consider the data showing the initial rate of...Ch. 13 - 45. The tabulated data were collected for this...Ch. 13 - 46. The tabulated data were collected for this...Ch. 13 - 47. Indicate the order of reaction consistent with...Ch. 13 - 48. Indicate the order of reaction consistent with...Ch. 13 - 49. The tabulated data show the concentration of...Ch. 13 - Prob. 48ECh. 13 - 51. The tabulated data show the concentration of...Ch. 13 - 52. The reaction A → products was monitored as a...Ch. 13 - Prob. 51ECh. 13 - Prob. 52ECh. 13 - Prob. 53ECh. 13 - Prob. 54ECh. 13 - 57. The half-life for the radioactive decay of...Ch. 13 - 58. The half-life for the radioactive decay of...Ch. 13 - 5957. The diagram shows the energy of a reaction...Ch. 13 - Prob. 58ECh. 13 - Prob. 59ECh. 13 - Prob. 60ECh. 13 - Prob. 61ECh. 13 - Prob. 62ECh. 13 - 65. The data shown here were collected for the...Ch. 13 - Prob. 64ECh. 13 - 67. The tabulated data were collected for the...Ch. 13 - 68. The tabulated data show the rate constant of a...Ch. 13 - 69. A reaction has a rate constant of 0.0117/s at...Ch. 13 - 70. A reaction has a rate constant of 0.000122/s...Ch. 13 - Prob. 69ECh. 13 - Prob. 70ECh. 13 - Prob. 71ECh. 13 - Prob. 72ECh. 13 - Prob. 73ECh. 13 - Prob. 74ECh. 13 - Prob. 75ECh. 13 - Prob. 76ECh. 13 - 79. Many heterogeneous catalysts are deposited on...Ch. 13 - 80. Suppose that the reaction A → products is...Ch. 13 - 81. Suppose that a catalyst lowers the activation...Ch. 13 - Prob. 80ECh. 13 - Prob. 81ECh. 13 - Prob. 82ECh. 13 - Prob. 83ECh. 13 - Prob. 84ECh. 13 - Prob. 85ECh. 13 - Prob. 86ECh. 13 - Prob. 87ECh. 13 - Prob. 88ECh. 13 - 91. Iodine atoms combine to form I2 in liquid...Ch. 13 - 9290. The hydrolysis of sucrose (C12H22O11) into...Ch. 13 - 9391. The reaction AB(aq) ? A(g) + B(g) is second...Ch. 13 - Prob. 92ECh. 13 - Prob. 93ECh. 13 - Prob. 94ECh. 13 - 97. The desorption (leaving of the surface) of a...Ch. 13 - Prob. 96ECh. 13 - 99. The kinetics of this reaction were studied as...Ch. 13 - Prob. 98ECh. 13 - Prob. 99ECh. 13 - 102100. Consider the two reactions: a. Why is...Ch. 13 - 103. Anthropologists can estimate the age of a...Ch. 13 - 104. Geologists can estimate the age of rocks by...Ch. 13 - Prob. 103ECh. 13 - 106104. Consider the reaction: 2 NH3(aq) +...Ch. 13 - Prob. 105ECh. 13 - Prob. 106ECh. 13 - Prob. 107ECh. 13 - Prob. 108ECh. 13 - Prob. 109ECh. 13 - Prob. 110ECh. 13 - 113. In this chapter we have seen a number of...Ch. 13 - 1124. The first-order integrated rate law for the...Ch. 13 - 115. The previous exercise shows how the...Ch. 13 - Prob. 114ECh. 13 - Prob. 115ECh. 13 - Prob. 116ECh. 13 - Prob. 117ECh. 13 - 120118. Consider the reaction: CHCl3(g) + Cl2(g) ?...Ch. 13 - Prob. 119ECh. 13 - Prob. 120E
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