General, Organic, and Biological Chemistry: Structures of Life (5th Edition)
5th Edition
ISBN: 9780321967466
Author: Karen C. Timberlake
Publisher: PEARSON
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Textbook Question
Chapter 11.9, Problem 11.67QAP
Which of the following represents a buffer system? Explain.
a. NaOH and NaCI
b.
c. HF and KF
d. KCI and NaCI
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A buffer contains H2P04- and HPO42-. write the reaction that occurs when NaOH is added.
Is this a buffer system?
NaF + Ca5 (PO4)3OH<---->Ca5(PO4)3F + Na+ + OH-
Also, how does Le Chatelier’s principle impact the above?
Which set of compounds would form a buffer in an aqueous solution?Â
(a) NaCl and KCl
(b) NaF and NaOH
(c) HBr and NaBr
(d) HF and KCN
(e) HF and KF
(f) HCN and NaCN
(g) HCI and HCIO
(h) NaF and KF
Chapter 11 Solutions
General, Organic, and Biological Chemistry: Structures of Life (5th Edition)
Ch. 11.1 - Indicate whether each of the following statements...Ch. 11.1 - Prob. 11.2QAPCh. 11.1 - Prob. 11.3QAPCh. 11.1 - Name each of the following acids or bases: a....Ch. 11.1 - Write formulas for each of the following acids and...Ch. 11.1 - Write formulas for each of the following acids and...Ch. 11.2 - Identify the reactant that is a Bronsted-Lowry...Ch. 11.2 - Prob. 11.8QAPCh. 11.2 - Prob. 11.9QAPCh. 11.2 - Prob. 11.10QAP
Ch. 11.2 - Prob. 11.11QAPCh. 11.2 - Prob. 11.12QAPCh. 11.2 - Identify the Bronsted-Lowry acid-base pairs in...Ch. 11.2 - Prob. 11.14QAPCh. 11.2 - Prob. 11.15QAPCh. 11.2 - Prob. 11.16QAPCh. 11.3 - What is meant by the phrase ”A strong acid as a...Ch. 11.3 - Prob. 11.18QAPCh. 11.3 - Prob. 11.19QAPCh. 11.3 - Prob. 11.20QAPCh. 11.3 - Prob. 11.21QAPCh. 11.3 - Prob. 11.22QAPCh. 11.3 - Prob. 11.23QAPCh. 11.3 - Prob. 11.24QAPCh. 11.3 - Prob. 11.25QAPCh. 11.3 - Prob. 11.26QAPCh. 11.4 - Answer true or false for each of the following: A...Ch. 11.4 - Prob. 11.28QAPCh. 11.4 - Prob. 11.29QAPCh. 11.4 - Consider the following acids and their...Ch. 11.4 - Prob. 11.31QAPCh. 11.4 - Prob. 11.32QAPCh. 11.5 - Why are the concentrations of H3O+ and OH- equal...Ch. 11.5 - Prob. 11.34QAPCh. 11.5 - Prob. 11.35QAPCh. 11.5 - Prob. 11.36QAPCh. 11.5 - Prob. 11.37QAPCh. 11.5 - Prob. 11.38QAPCh. 11.5 - Prob. 11.39QAPCh. 11.5 - Prob. 11.40QAPCh. 11.5 - 11.41 Calculate the of each aqueous solution with...Ch. 11.5 - Prob. 11.42QAPCh. 11.6 - Prob. 11.43QAPCh. 11.6 - Prob. 11.44QAPCh. 11.6 - Prob. 11.45QAPCh. 11.6 - Prob. 11.46QAPCh. 11.6 - Prob. 11.47QAPCh. 11.6 - Prob. 11.48QAPCh. 11.6 - Prob. 11.49QAPCh. 11.6 - Prob. 11.50QAPCh. 11.6 - Prob. 11.51QAPCh. 11.6 - Prob. 11.52QAPCh. 11.6 - Prob. 11.53QAPCh. 11.6 - Prob. 11.54QAPCh. 11.7 - Prob. 11.55QAPCh. 11.7 - Complete and balance the equation for each of the...Ch. 11.7 - Prob. 11.57QAPCh. 11.7 - Prob. 11.58QAPCh. 11.7 - Prob. 11.59QAPCh. 11.7 - Prob. 11.60QAPCh. 11.8 - Prob. 11.61QAPCh. 11.8 - Prob. 11.62QAPCh. 11.8 - Prob. 11.63QAPCh. 11.8 - Prob. 11.64QAPCh. 11.8 - A solution of 0.204 M NaOH is used to titrate 50.0...Ch. 11.8 - Prob. 11.66QAPCh. 11.9 - Which of the following represents a buffer system?...Ch. 11.9 - Prob. 11.68QAPCh. 11.9 - Prob. 11.69QAPCh. 11.9 - Prob. 11.70QAPCh. 11.9 - Prob. 11.71QAPCh. 11.9 - Prob. 11.72QAPCh. 11.9 - Prob. 11.73QAPCh. 11.9 - Prob. 11.74QAPCh. 11.9 - Why would the pH of your blood plasma increase if...Ch. 11.9 - Why would the pH of your blood plasma decrease if...Ch. 11.9 - Prob. 11.77QAPCh. 11.9 - Someone with severe diabetes obtains energy by the...Ch. 11.9 - Prob. 11.79QAPCh. 11.9 - When food enters the stomach, HCI is released and...Ch. 11.9 - Prob. 11.81QAPCh. 11.9 - Prob. 11.82QAPCh. 11.9 - Prob. 11.83QAPCh. 11.9 - Prob. 11.84QAPCh. 11.9 - Prob. 11.85QAPCh. 11.9 - Prob. 11.86QAPCh. 11 - Prob. 11.87UTCCh. 11 - Prob. 11.88UTCCh. 11 - Prob. 11.89UTCCh. 11 - Prob. 11.90UTCCh. 11 - Prob. 11.91UTCCh. 11 - Prob. 11.92UTCCh. 11 - Prob. 11.93UTCCh. 11 - Prob. 11.94UTCCh. 11 - Prob. 11.95UTCCh. 11 - Prob. 11.96UTCCh. 11 - Identify each of the following as an acid, base,...Ch. 11 - Idenúfy each of the following as an acid, base, or...Ch. 11 - Complete the following table: (11.2) Acid...Ch. 11 - Complete the following table: (11.2) Base...Ch. 11 - Using Table 11.3, identify the stronger acid in...Ch. 11 - Prob. 11.102AQAPCh. 11 - Determine the pH for each of the following...Ch. 11 - Determine the pH for each of the following...Ch. 11 - Prob. 11.105AQAPCh. 11 - Prob. 11.106AQAPCh. 11 - Calculate the [H3O+] and [OH] for a solution with...Ch. 11 - Calculate the [H3O+]and [OH]for a solution with...Ch. 11 - Solution A has a pH of 4.5, and solution B has a...Ch. 11 - Solution X has a pH of 9.5, and solution Y has a...Ch. 11 - Prob. 11.111AQAPCh. 11 - Prob. 11.112AQAPCh. 11 - What is the pH of a solution prepared by...Ch. 11 - Prob. 11.114AQAPCh. 11 - For each of the following: (11.2, 11.3) 1. H2S a....Ch. 11 - Prob. 11.116CQCh. 11 - Prob. 11.117CQCh. 11 - Prob. 11.118CQCh. 11 - Prob. 11.119CQCh. 11 - Prob. 11.120CQCh. 11 - Prob. 11.121CQCh. 11 - Prob. 11.122CQCh. 11 - Prob. 11.123CQCh. 11 - Prob. 11.124CQCh. 11 - Prob. 11.125CQCh. 11 - Prob. 11.126CQCh. 11 - Prob. 11.127CQCh. 11 - Prob. 11.128CQCh. 11 - Prob. 11.129CQCh. 11 - Prob. 11.130CQCh. 11 - Prob. 19CICh. 11 - Prob. 20CICh. 11 - Prob. 21CICh. 11 - Prob. 22CICh. 11 - Prob. 23CICh. 11 - Prob. 24CICh. 11 - A volume of 200.0 mL of a carbonic acid buffer for...Ch. 11 - Prob. 26CI
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- 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_forwardIdentify each pair that could form a buffer. (a) NaOH and NaCl (b) NaOH and NH3 (c) Na3PO4 and Na2HPO4arrow_forwardEnough water is added to the buffer in Question 30 to make the total volume 5.00 L. (a) Calculate the pH of the buffer. (b) Calculate the pH of the buffer after adding 0.0250 mol of HCl to 0.376 L of the buffer. (c) Calculate the pH of the buffer after adding 0.0250 mol of KOH to 0.376 L of the buffer. (d) Compare your answers to Question 30 (a-c) with your answers to (a-c) of this problem. (e) Comment on the effect of dilution on the pH of a buffer and on its buffer capacity. Ă‚arrow_forward
- Identify each pair that could form a buffer. (a) HCl and CH3COOH (b) NaH2PO4 and Na2HPO4 (c) H2CO3 and NaHCO3arrow_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_forwardConsider the weak acids in Table 13.2. Which acid-base pair would be best for a buffer at a pH of (a) 3.0(b) 6.5 (c) 12.0arrow_forward
- What is meant by the capacity of a buffer? Describe a buffer with low capacity and the same buffer with greater capacity.arrow_forwardA 0.239-g sample of unknown organic base is dissolved in water and titrated with a 0.135 M hydrochloric acid solution. After the addition of 18.35 mL of acid, a pH of 10.73 is recorded. The equivalence point is reached when a total of 39.24 mL of HCl is added. The base and acid combine in a 1:1 ratio. a What is the molar mass of the organic base? b What is the Kb value for the base? The Kb value could have been determined very easily if a pH measurement had been made after the addition of 19.62 mL of HCl. Why?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
- Briefly 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_forwardHow do buffers work? Explain using H2CO3-NaHCO3 buffer by writing the equations for: (a) dissociation with water (b) addition of HCl (c) addition of NaOHarrow_forwardWhat is a buffer capacity? What are the factors that affect buffer capacity? Explain briefly how these factors affect buffer capacity. Â Can you please give me a brief answer about this question? Not less than 3 sentances.arrow_forward
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