Introductory Chemistry (6th Edition)
6th Edition
ISBN: 9780134554525
Author: Tro
Publisher: PEARSON
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Textbook Question
Chapter 14, Problem 123QGW
With group members acting as atoms or ions, act out the reaction that occurs when HCl is added to a buffer solution composed of
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A buffer is made by adding NaF to a solution of HF. Does a neutralization reaction
occur if an acidic solution (contains excess H3O+) is added to this buffer? If so, write the
balanced reaction.
A buffer is made by adding NaF to a solution of HF. Does a neutralization reaction
occur if a basic solution (contains excess OH-) is added to this buffer? If so, write the
balanced reaction.
You make 1.00 L of a buffered solution (pH=4.20) by mixing acetic acid and sodium acetate. You have 1.00 M solutions of each component of the buffered solution. What volume of each solution do you mix to make such a buffered solution? ( Ka for acetic acid is 1.8x10^-5)
Volume of acetic acid = L
Volume of sodium acetate= L
Consider a buffer solution that consists of weak acid, HF (aq) and its conjugate base, F-. Write the reaction that occurs when a strong acid (H+) is added then write the reaction that occurs when a strong base (OH-) is added
Chapter 14 Solutions
Introductory Chemistry (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.
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Ch. 14 - 72. Calculate of each solution.
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Ch. 14 - Prob. 73ECh. 14 - Prob. 74ECh. 14 - 75. Calculate of each solution.
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Ch. 14 - 76. Calculate of each solution.
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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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- Does the pH of the solution increase, decrease, or stay the same when you (a) Add solid sodium oxalate, Na2C2O4, to 50.0 mL of 0.015-M oxalic acid? (b) Add solid ammonium chloride to 100. mL of 0.016-M HCl? (c) Add 20.0 g NaCl to 1.0 L of 0.012-M sodium acetate, NaCH3COO?arrow_forwardWrite an equation for each of the following buffering actions. a. the response of a HPO42/PO43 buffer to the addition of OH ions b. the response of a HF/F buffer to the addition of OH ions c. the response of a HCN/CN buffer to the addition of H3O+ ions d. the response of a H3PO4/H2PO4 buffer to the addition of H3O+ ionsarrow_forwardIdentify each pair that could form a buffer. (a) HCl and CH3COOH (b) NaH2PO4 and Na2HPO4 (c) H2CO3 and NaHCO3arrow_forward
- Phenol, C6H5OH, is a weak organic acid. Suppose 0.515 g of the compound is dissolved in enough water to make 125 mL of solution. The resulting solution is titrated with 0.123 M NaOH. C6H5OH(aq) + OH(aq) C6H5O(aq) + H2O() (a) What is the pH of the original solution of phenol? (b) What are the concentrations of all of the following ions at the equivalence point: Na+, H3O+, OH, and C6H5O? (c) What is the pH of the solution at the equivalence point?arrow_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_forwardAn important component of blood is the buffer combination of bicarbonate ion and carbonic acid. Consider blood with a pH of 7.42. a What is the ratio of [H2CO3] to [HCO3]? b What does the pH become if 15% of the bicarbonate ions are converted to carbonic acid? c What does the pH become if 25% of the carbonic acid molecules are converted to bicarbonate ions?arrow_forward
- Enough water is added to the buffer in Question 29 to make the total volume 10.0 L. Calculate (a) the pH of the buffer. (b) the pH of the buffer after the addition of 0.0500 mol of HCl to 0.600 L of diluted buffer. (c) the pH of the buffer after the addition of 0.0500 mol of NaOH to 0.600 L of diluted buffer. (d) Compare your answers to Question 29(a)-(c) with your answers to (a)-(c) in this problem. (e) Comment on the effect of dilution on the pH of a buffer and on its buffer capacity.arrow_forwardFor conjugate acidbase pairs, how are Ka and Kb related? Consider the reaction of acetic acid in water CH3CO2H(aq)+H2O(l)CH3CO2(aq)+H3O+(aq) where Ka = 1.8 105 a. Which two bases are competing for the proton? b. Which is the stronger base? c. In light of your answer to part b. why do we classify the acetate ion (CH3CO2) as a weak base? Use an appropriate reaction to justify your answer. In general, as base strength increases, conjugate acid strength decreases. Explain why the conjugate acid of the weak base NH3 is a weak acid. To summarize, the conjugate base of a weak acid is a weak base and the conjugate acid of a weak base is a weak acid (weak gives you weak). Assuming Ka for a monoprotic strong acid is 1 106, calculate Kb for the conjugate base of this strong acid. Why do conjugate bases of strong acids have no basic properties in water? List the conjugate bases of the six common strong acids. To tie it all together, some instructors have students think of Li+, K+, Rb+, Cs+, Ca2+, Sr2+, and Ba2+ as the conjugate acids of the strong bases LiOH, KOH. RbOH, CsOH, Ca(OH)2, Sr(OH)2, and Ba(OH)2. Although not technically correct, the conjugate acid strength of these cations is similar to the conjugate base strength of the strong acids. That is, these cations have no acidic properties in water; similarly, the conjugate bases of strong acids have no basic properties (strong gives you worthless). Fill in the blanks with the correct response. The conjugate base of a weak acid is a_____base. The conjugate acid of a weak base is a_____acid. The conjugate base of a strong acid is a_____base. The conjugate acid of a strong base is a_____ acid. (Hint: Weak gives you weak and strong gives you worthless.)arrow_forwardIdentify each pair that could form a buffer. (a) NaOH and NaCl (b) NaOH and NH3 (c) Na3PO4 and Na2HPO4arrow_forward
- Methyl orange, HMO, is a common acid-base indicator. In solution it ionizes according to the equation: HMOaqH+aq+MO-aqredyellow If methyl orange is added to distilled water, the solution turns yellow. If 1 drop or two of 6 M HCl is added to the yellow solution, it turns red. If to that solution one adds a few drops of 6 M NaOH, the color reverts to yellow. a. Why does adding 6 M HCl to the yellow solution of methyl orange tend to cause the color to change to red? Note that in solution HCl exists as H+ and Cl- ions. b. Why does adding 6 M NaOH to the red solution tend to make it turn back to yellow? Note that in solution NaOH exists as Na+ and OH- ions. How does increasing OH- shift Reaction 3 in the discussion section? How would the resulting change in H+ affect the dissociation reaction of HMO?arrow_forward. A buffered solution is prepared containing acetic acid, HC2H3O2, and sodium acetate, NaC2H3O2, both at 0.5 M. Write a chemical equation showing how this buffered solution would resist a decrease in its pH if a few drops of aqueous strong acid HCI solution were added to it. Write a chemical equation showing how this buffered solution would resist an increase in its pH if a few drops of aqueous strong base NaOH solution were added to it.arrow_forwardConsider sodium acrylate, NaC3H3O2. Ka for acrylic acid (its conjugate acid) is 5.5 105. (a) Write a balanced net ionic equation for the reaction that makes aqueous solutions of sodium acrylate basic. (b) Calculate Kb for the reaction in (a). (c) Find the pH of a solution prepared by dissolving 1.61 g NaC3H3O2 in enough water to make 835 mL of solution.arrow_forward
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