Introductory Chemistry, Books a la Carte Plus Mastering Chemistry with Pearson eText -- Access Card Package (6th Edition)
6th Edition
ISBN: 9780134557311
Author: Nivaldo J. Tro
Publisher: PEARSON
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Textbook Question
Chapter 14, Problem 86E
Determine whether or not each mixture is a buffer.
a. HBr and NaCl
b.
c.
d.
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Which solution would make an effective buffer?
Solution A: 1.0 M NH3Â and 1.0 MÂ HC2H3O2
Solution B: 1.0 M NaHCO3Â and 1.0 M NaNO3
Solution C: 1.0 M HC2H3O2Â and 1.0 M NaC2H3O2
Solution D: 1.0 M HCl and 1.25 M NaOH
Which of the following mixtures would make the best buffer?
A.
HCl and NaOH
B.
CH3CO2H and NH4Cl
C.
CH3CO2Na and NH3
D.
CH3CO2Na and NH4Cl
E.
NH3Â and NH4Cl
A 1.0-L buffer solution is 0.125 M in HNO2 and 0.195 M in NaNO2 .
A: Determine the concentrations of HNO2 and NaNO2 after addition of 1.9 g HCl .
B: Determine the concentrations of HNO2 and NaNO2 after addition of 1.9 g NaOH .
C: Determine the concentrations of HNO2 and NaNO2 after addition of 1.9 g HI .
Chapter 14 Solutions
Introductory Chemistry, Books a la Carte Plus Mastering Chemistry with Pearson eText -- Access Card Package (6th Edition)
Ch. 14 - Which substance is most likely to have a bitter...Ch. 14 - Identity the Brnsted-Lowry base in the reaction....Ch. 14 - What is the conjugate base of the acid HClO4 ? a....Ch. 14 - Prob. 4SAQCh. 14 - Q5. What are the products of the reaction between...Ch. 14 - A 25.00-mL sample of an HNO3 solution is titrated...Ch. 14 - In which solution is [H3O+] less than 0.100 M? a....Ch. 14 - Prob. 8SAQCh. 14 - Prob. 9SAQCh. 14 - What is the pH of a solution with [H3O+]=2.8105M ?...
Ch. 14 - What is [OH] in a solution with a pH of 9.55 ? a....Ch. 14 - A buffer contains HCHO2(aq) and KCHO2(aq). Which...Ch. 14 - 1. What makes tart gummy candies, such as Sour...Ch. 14 - What are the properties of acids? List some foods...Ch. 14 - 3. What is the main component of stomach acid? Why...Ch. 14 - Prob. 4ECh. 14 - What are the properties of bases? Provide some...Ch. 14 - Prob. 6ECh. 14 - Restate the Arrhenius definition of an acid and...Ch. 14 - Prob. 8ECh. 14 - 9. Restate the Brønsted-Lowry definitions of acids...Ch. 14 - Prob. 10ECh. 14 - What is an acidbase neutralization reaction?...Ch. 14 - Prob. 12ECh. 14 - Prob. 13ECh. 14 - 14. Name a metal that a base can dissolve and...Ch. 14 - What is titration? What is the equivalence point?Ch. 14 - Prob. 16ECh. 14 - What is the difference between a strong acid and a...Ch. 14 - Prob. 18ECh. 14 - Prob. 19ECh. 14 - Prob. 20ECh. 14 - Does pure water contain any H3O+ ions? Explain...Ch. 14 - Prob. 22ECh. 14 - 23. Give a possible value of and in a solution...Ch. 14 - 24. How is pH defined? A change of 1.0 pH unit...Ch. 14 - 25. How is pOH defined? A change of 2.0 pOH units...Ch. 14 - Prob. 26ECh. 14 - What is a buffer?Ch. 14 - Prob. 28ECh. 14 - Identify each substance as an acid or a base and...Ch. 14 - 30. Identify each substance as an acid or a base...Ch. 14 - 31. For each reaction, identify the Brønsted-Lowry...Ch. 14 - For each reaction, identify the Brnsted-Lowry...Ch. 14 - Determine whether each pair is a conjugate...Ch. 14 - Determine whether each pair is a conjugate...Ch. 14 - Write the formula for the conjugate base of each...Ch. 14 - Prob. 36ECh. 14 - 37. Write the formula for the conjugate acid of...Ch. 14 - Prob. 38ECh. 14 - Write a neutralization reaction for each acid and...Ch. 14 - Write a neutralization reaction for each acid and...Ch. 14 - 41. Write a balanced chemical equation showing how...Ch. 14 - Prob. 42ECh. 14 - Prob. 43ECh. 14 - Prob. 44ECh. 14 - Prob. 45ECh. 14 - Prob. 46ECh. 14 - 47. Four solutions of unknown HCl concentration...Ch. 14 - 48. Four solutions of unknown NaOH concentration...Ch. 14 - 49. A 25.00-mL sample of an solution of unknown...Ch. 14 - 50. A 5.00-mL sample of an solution of unknown...Ch. 14 - What volume in milliliters of a 0.121 M sodium...Ch. 14 - 52. What volume in milliliters of a 0.0985 M...Ch. 14 - Prob. 53ECh. 14 - 54. Classify each acid as strong or...Ch. 14 - Prob. 55ECh. 14 - Determine [H3O+] in each acid solution. If the...Ch. 14 - Prob. 57ECh. 14 - Prob. 58ECh. 14 - Prob. 59ECh. 14 - Prob. 60ECh. 14 - 61. Determine if each solution is acidic, basic,...Ch. 14 - Prob. 62ECh. 14 - Calculate [OH] given [H3O+] in each aqueous...Ch. 14 - Calculate [OH] given [H3O+] in each aqueous...Ch. 14 - Calculate [H3O+] given [OH] in each aqueous...Ch. 14 - 66. Calculate given in each aqueous solution and...Ch. 14 - 67. Classify each solution as acidic, basic, or...Ch. 14 - Prob. 68ECh. 14 - 69. Calculate the pH of each...Ch. 14 - Calculate the pH of each solution. a....Ch. 14 - 71. Calculate of each solution.
a.
b.
c.
d.
Ch. 14 - 72. Calculate of each solution.
a.
b.
c.
d.
Ch. 14 - Prob. 73ECh. 14 - Prob. 74ECh. 14 - 75. Calculate of each solution.
a.
b.
c.
d.
Ch. 14 - 76. Calculate of each solution.
a.
b.
c.
d.
Ch. 14 - Calculate the pH of each solution: a. 0.0155MHBr...Ch. 14 - Prob. 78ECh. 14 - Determine the pOH of each solution and classify it...Ch. 14 - Determine the pOH of each solution and classify it...Ch. 14 - Determine the pOH of each solution. a....Ch. 14 - Prob. 82ECh. 14 - Prob. 83ECh. 14 - Prob. 84ECh. 14 - 85. Determine whether or not each mixture is a...Ch. 14 - Determine whether or not each mixture is a buffer....Ch. 14 - Prob. 87ECh. 14 - 88. Write reactions showing how each of the...Ch. 14 - Prob. 89ECh. 14 - Which substance could you add to each solution to...Ch. 14 - 91. How much 0.100 M HCl is required to completely...Ch. 14 - How much 0.200 M KOH is required to completely...Ch. 14 - What is the minimum volume of 5.0 M HCl required...Ch. 14 - What is the minimum volume of 3.0 M HBr required...Ch. 14 - Prob. 95ECh. 14 - Prob. 96ECh. 14 - A 0.125-g sample of a monoprotic acid of unknown...Ch. 14 - Prob. 98ECh. 14 - 99. People take antacids, such as milk of...Ch. 14 - An antacid tablet requires 25.82 mL of 200 M HCl...Ch. 14 - Prob. 101ECh. 14 - Prob. 102ECh. 14 - Complete the table. (The first row is completed...Ch. 14 - Prob. 104ECh. 14 - Prob. 105ECh. 14 - Prob. 106ECh. 14 - 107. For each strong base solution, determine , ...Ch. 14 - Prob. 108ECh. 14 - 109. As described in Section 14.1, jailed spies on...Ch. 14 - Prob. 110ECh. 14 - 111. What is the pH of a solution formed by mixing...Ch. 14 - Prob. 112ECh. 14 - 113. How many (or ) ions are present in one drop...Ch. 14 - Prob. 114ECh. 14 - Prob. 115ECh. 14 - Prob. 116ECh. 14 - Prob. 117ECh. 14 - Prob. 118ECh. 14 - Prob. 119ECh. 14 - Choose an example of a reaction featuring a...Ch. 14 - 121. Divide your group in two. Have each half of...Ch. 14 - Prob. 122QGWCh. 14 - With group members acting as atoms or ions, act...Ch. 14 - Data Interpretation and Analysis
124. The progress...
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- Identify each pair that could form a buffer. (a) HCl and CH3COOH (b) NaH2PO4 and Na2HPO4 (c) H2CO3 and NaHCO3arrow_forwardAnother way to treat data from a pH titration is to graph the absolute value of the change in pH per change in milliliters added versus milliliters added (pH/mL versus mL added). Make this graph using your results from Exercise 61. What advantage might this method have over the traditional method for treating titration data?arrow_forwardBriefly describe how a buffer solution can control the pH of a solution when strong acid is added and when strong base is added. Use NH3/NH4Cl as an example of a buffer and HCl and NaOH as the strong acid and strong base.arrow_forward
- Identify each pair that could form a buffer. (a) NaOH and NaCl (b) NaOH and NH3 (c) Na3PO4 and Na2HPO4arrow_forwardA solution made up of 1.0 M NH3 and 0.50 M (NH4)2SO4 has a pH of 9.26. a Write the net ionic equation that represents the reaction of this solution with a strong acid. b Write the net ionic equation that represents the reaction of this solution with a strong base. c To 100. mL of this solution, 10.0 mL of 1.00 M HCl is added. How many moles of NH3 and NH4+ are present in the reaction system before and after the addition of the HCl? What is the pH of the resulting solution? d Why did the pH change only slightly upon the addition of HCl?arrow_forwardA buffer solution was prepared by adding 4.95 g sodium acetate to 250. mL of 0.150-M acetic acid. What ions and molecules are present in the solution? List them in order of decreasing concentration. Calculate the pH of the buffer solution. Calculate the pH of 100. mL of the buffer solution if you add 80. mg NaOH. (Assume negligible change in volume.) Write a net ionic equation for the reaction that occurs to change the pH.arrow_forward
- a Draw a pH titration curve that represents the titration of 50.0 mL of 0.10 M NH3 by the addition of 0.10 M HCl from a buret. Label the axes and put a scale on each axis. Show where the equivalence point and the buffer region are on the titration curve. You should do calculations for the 0%, 30%, 50%, and 100% titration points. b Is the solution neutral, acidic, or basic at the equivalence point? Why?arrow_forwardA student intends to titrate a solution of a weak monoprotic acid with a sodium hydroxide solution but reverses the two solutions and places the weak acid solution in the buret. After 23.75 mL of the weak acid solution has been added to 50.0 mL of the 0.100 M NaOH solution, the pH of the resulting solution is 10.50. Calculate the original concentration of the solution of weak acid.arrow_forwardAn aqueous solution contains dissolved C6H5NH3Cl and C6H5NH2. The concentration of C6H5NH2 is 0.50 M and pH is 4.20. a. Calculate the concentration of C6H5NH3+ in this buffer solution. b. Calculate the pH after 4.0 g NaOH(s) is added to 1.0 L of this solution. (Neglect any volume change.)arrow_forward
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