Masteringchemistry With Pearson Etext -- Valuepack Access Card -- For Principles Of Chemistry: A Molecular Approach
3rd Edition
ISBN: 9780133890686
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Chapter 16, Problem 2SAQ
Interpretation Introduction
Introduction: The pH of a buffer is calculated by the use of Henderson–Hassel Balch equation as:
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3. Refer to the data below to answer the following questions:
Isoelectric point
Amino Acid
Arginine
10.76
Glutamic Acid
3.22
Tryptophan
5.89
A. Define isoelectric point.
B. The most basic amino acid is
C. The most acidic amino acid is
sidizo zo
3. A gas mixture contains 50 mol% H2 and 50 mol% He.
1.00-L samples of this gas mixture are mixed with
variable volumes of O2 (at 0 °C and 1 atm). A spark is
introduced to allow the mixture to undergo complete
combustion. The final volume is measured at 0 °C and 1
atm. Which graph best depicts the final volume as a
function of the volume of added O2?
(A)
2.00
1.75
Final Volume, L
1.50
1.25
1.00
0.75
0.50
0.25
0.00
0.00
0.25
0.50
2.00
(B)
1.75
1.50
Final Volume, L
1.25
1.00
0.75
0.50-
0.25
0.00
0.75
1.00
0.00
0.25
Volume O₂ added, L
2
0.50
0.75
1.00
Volume O₂ added, L
2
2.00
2.00
(C)
(D)
1.75
1.75
1.50
1.50
Final Volume, L
1.25
1.00
0.75
0.50
Final Volume, L
1.25
1.00
0.75
0.50
0.25
0.25
0.00
0.00
0.00
0.25
0.50
0.75
1.00
0.00
0.25
Volume O₂ added, L
0.50
0.75
1.00
Volume O₂ added, L
2
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid. It has pai
2.36 and pKa2 = 9.60.
H2N-C(R)H-COOH and R is -CH2-CH(CH3)2
A. Draw the condensed structure for leucine, and label all chirality centers with an asterisk.
B. How many possible stereoisomers of leucine are there?
C. Draw a Fischer projection of L-leucine and label the chirality center(s) as R or S.
D. What is the p/ of leucine?
E. Draw the structure of the predominant form of leucine at 10.00.
F.
Draw the structure of the predominant form of leucine at pH = 1.50.
G. Leucine is described as an essential amino acid. What does this mean?
H. Show the alkyl halide you would use to prepare leucine by the amidomalonate method.
=
Chapter 16 Solutions
Masteringchemistry With Pearson Etext -- Valuepack Access Card -- For Principles Of Chemistry: A Molecular Approach
Ch. 16 - Prob. 1SAQCh. 16 - Q2. What is the pH of a buffer that is 0.120 M in...Ch. 16 - Q3. A buffer with a pH of 9.85 contains CH3NH2 and...Ch. 16 - Q4. A 500.0-mL buffer solution is 0.10 M in...Ch. 16 - Q5. Consider a buffer composed of the weak acid HA...Ch. 16 - Q6. Which combination is the best choice to...Ch. 16 - Q7. A 25.0-mL sample of an unknown HBr solution is...Ch. 16 - Q8. A 10.0-mL sample of 0.200 M hydrocyanic acid...Ch. 16 - Q9. A 20.0-mL sample of 0.150 M ethylamine is...Ch. 16 - Q10. Three 15.0-mL acid samples—0.10 M HA, 0.10 M...
Ch. 16 - Q11. A weak unknown monoprotic acid is titrated...Ch. 16 - Q12. Calculate the molar solubility of lead(II)...Ch. 16 - Q13. Calculate the molar solubility of magnesium...Ch. 16 - Q14. A solution is 0.025 M in Pb2 +. What minimum...Ch. 16 - Q15. Which compound is more soluble in an acidic...Ch. 16 - 1. What is the pH range of human blood? How is...Ch. 16 - 2. What is a buffer? How does a buffer work? How...Ch. 16 - 3. What is the common ion effect?
Ch. 16 - 4. What is the Henderson–Hasselbalch equation, and...Ch. 16 - 5. What is the pH of a buffer solution when the...Ch. 16 - 6. Suppose that a buffer contains equal amounts of...Ch. 16 - 7. How do you use the Henderson–Hasselbalch...Ch. 16 - 8. What factors influence the effectiveness of a...Ch. 16 - 9. What is the effective pH range of a buffer...Ch. 16 - 10. Describe acid–base titration. What is the...Ch. 16 - 11. The pH at the equivalence point of the...Ch. 16 - 12. The volume required to reach the equivalence...Ch. 16 - 13. In the titration of a strong acid with a...Ch. 16 - 14. In the titration of a weak acid with a strong...Ch. 16 - 15. The titration of a polyprotic acid with...Ch. 16 - 16. In the titration of a polyprotic acid, the...Ch. 16 - 17. What is the difference between the endpoint...Ch. 16 - 18. What is an indicator? How can an indicator...Ch. 16 - 19. What is the solubility product constant? Write...Ch. 16 - 20. What is molar solubility? How can you obtain...Ch. 16 - 21. How does a common ion affect the solubility of...Ch. 16 - 22. How is the solubility of an ionic compound...Ch. 16 - 23. For a given solution containing an ionic...Ch. 16 - 24. What is selective precipitation? Under which...Ch. 16 - 25. What is qualitative analysis? How does...Ch. 16 - 26. What are the main groups in the general...Ch. 16 - 27. In which of these solutions will HNO2 ionize...Ch. 16 - 28. A formic acid solution has a pH of 3.25. Which...Ch. 16 - 29. Solve an equilibrium problem (using an ICE...Ch. 16 - 30. Solve an equilibrium problem (using an ICE...Ch. 16 - 31. Calculate the percent ionization of a 0.15 M...Ch. 16 - 32. Calculate the percent ionization of a 0.13 M...Ch. 16 - 33. Solve an equilibrium problem (using an ICE...Ch. 16 - 34. Solve an equilibrium problem (using an ICE...Ch. 16 - 35. A buffer contains significant amounts of...Ch. 16 - 36. A buffer contains significant amounts of...Ch. 16 - Prob. 37ECh. 16 - Prob. 38ECh. 16 - 39. Use the Henderson–Hasselbalch equation to...Ch. 16 - 40. Use the Henderson–Hasselbalch equation to...Ch. 16 - 41. Calculate the pH of the solution that results...Ch. 16 - 42. Calculate the pH of the solution that results...Ch. 16 - 43. Calculate the ratio of NaF to HF required to...Ch. 16 - 44. Calculate the ratio of CH3NH2 to CH3NH3Cl...Ch. 16 - Prob. 45ECh. 16 - 46. What mass of ammonium chloride should you add...Ch. 16 - 47. A 250.0-mL buffer solution is 0.250 M in...Ch. 16 - 48. A 100.0-mL buffer solution is 0.175 M in HClO...Ch. 16 - Prob. 49ECh. 16 - 50. For each solution, calculate the initial and...Ch. 16 - Prob. 51ECh. 16 - 52. A 100.0-mL buffer solution is 0.100 M in NH3...Ch. 16 - 53. Determine whether or not the mixing of each...Ch. 16 - 54. Determine whether or not the mixing of each...Ch. 16 - 55. Blood is buffered by carbonic acid and the...Ch. 16 - 56. The fluids within cells are buffered by H2PO4–...Ch. 16 - 57. Which buffer system is the best choice to...Ch. 16 - Prob. 58ECh. 16 - 59. A 500.0-mL buffer solution is 0.100 M in HNO2...Ch. 16 - Prob. 60ECh. 16 - Prob. 61ECh. 16 - 62. Two 25.0-mL samples, one 0.100 M HCl and the...Ch. 16 - 63. Two 20.0-mL samples, one 0.200 M KOH and the...Ch. 16 - 64. The graphs labeled (a) and (b) show the...Ch. 16 - 65. Consider the curve shown here for the...Ch. 16 - 66. Consider the curve shown here for the...Ch. 16 - 67. Consider the titration of a 35.0-mL sample of...Ch. 16 - Prob. 68ECh. 16 - 69. Consider the titration of a 25.0-mL sample of...Ch. 16 - Prob. 70ECh. 16 - 71. Consider the titration of a 20.0-mL sample of...Ch. 16 - Prob. 72ECh. 16 - Prob. 73ECh. 16 - Prob. 74ECh. 16 - Consider the titration curves (labeled a and b)...Ch. 16 - Prob. 76ECh. 16 - Prob. 77ECh. 16 - 78. A 0.446-g sample of an unknown monoprotic acid...Ch. 16 - Prob. 79ECh. 16 - Prob. 80ECh. 16 - Prob. 81ECh. 16 - Prob. 82ECh. 16 - Prob. 83ECh. 16 - 84. Referring to Table 17.1, pick an indicator for...Ch. 16 - Prob. 85ECh. 16 - Prob. 86ECh. 16 - 87. Refer to the Ksp values in Table 17.2 to...Ch. 16 - 88. Refer to the Ksp values in Table 17.2 to...Ch. 16 - 89. Use the given molar solubilities in pure water...Ch. 16 - Prob. 90ECh. 16 - Prob. 91ECh. 16 - Prob. 92ECh. 16 - 93. Refer to the Ksp value from Table 17.2 to...Ch. 16 - Prob. 94ECh. 16 - 95. Calculate the molar solubility of barium...Ch. 16 - Prob. 96ECh. 16 - Prob. 97ECh. 16 - Prob. 98ECh. 16 - Prob. 99ECh. 16 - Prob. 100ECh. 16 - Prob. 101ECh. 16 - Prob. 102ECh. 16 - Prob. 103ECh. 16 - Prob. 104ECh. 16 - Prob. 105ECh. 16 - Prob. 106ECh. 16 - Prob. 107ECh. 16 - Prob. 108ECh. 16 - Prob. 109ECh. 16 - Prob. 110ECh. 16 - Prob. 111ECh. 16 - Prob. 112ECh. 16 - 113. A 150.0-mL solution contains 2.05 g of sodium...Ch. 16 - Prob. 114ECh. 16 - Prob. 115ECh. 16 - Prob. 116ECh. 16 - Prob. 117ECh. 16 - 118. A 250.0-mL buffer solution initially contains...Ch. 16 - 119. In analytical chemistry, bases used for...Ch. 16 - Prob. 120ECh. 16 - Prob. 121ECh. 16 - Prob. 122ECh. 16 - Prob. 123ECh. 16 - Prob. 124ECh. 16 - Prob. 125ECh. 16 - Prob. 126ECh. 16 - Prob. 127ECh. 16 - Prob. 128ECh. 16 - Prob. 129ECh. 16 - Prob. 130ECh. 16 - 131. The Kb of hydroxylamine, NH2OH, is 1.10 ×...Ch. 16 - 132. A 0.867-g sample of an unknown acid requires...Ch. 16 - Prob. 133ECh. 16 - Prob. 134ECh. 16 - 135. What relative masses of dimethyl amine and...Ch. 16 - Prob. 136ECh. 16 - Prob. 137ECh. 16 - Prob. 138ECh. 16 - 139. Since soap and detergent action is hindered...Ch. 16 - 140. A 0.558-g sample of a diprotic acid with a...Ch. 16 - 141. When excess solid Mg(OH)2 is shaken with 1.00...Ch. 16 - Prob. 142ECh. 16 - Prob. 143ECh. 16 - Prob. 144ECh. 16 - Prob. 145ECh. 16 - Prob. 146ECh. 16 - Prob. 147ECh. 16 - 148. What amount of HCl gas must be added to 1.00...Ch. 16 - 149. Without doing any calculations, determine if...Ch. 16 - 150. A buffer contains 0.10 mol of a weak acid and...Ch. 16 - Prob. 151ECh. 16 - Prob. 152ECh. 16 - Prob. 153E
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