General, Organic, and Biological Chemistry (3rd Edition)
3rd Edition
ISBN: 9780134042428
Author: Laura D. Frost, S. Todd Deal
Publisher: PEARSON
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Chapter 9, Problem 9.82AP
Consider the lactic-acid buffer with lactic acid, CH3CH(OH)COOH and its salt sodium lactate, NaCH3CH(OH)COO:
- a. What is the purpose of a buffer system?
- b. Why is a salt of the acid needed?
- c. How does the buffer react when acid (H3O+) is added?
- d. How does the buffer react when base (OH−) is added?
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5. According to LeChâtelier's principle, predict whether adding H30 causes the
reaction to shift in the direction of reactants, products, or no change
NH4+ (aq) + H₂O(l) NH3(aq) + H30+ (aq)
A. products
B. reactants
C. no change
6. An acid is being added slowly to a buffer solution. What observation
would indicate that the buffer is being effective?
A. A significant decrease in pH
B. A significant increase in pH
C. The pH stays essentially constant
D. No observation is known that would indicate that the buffer is
effective
2. A buffer solution is prepared by mixing 15.00 mL of 0.12 M CH COOH with 9.00 mL of
0.080 M NaOH.
a. Calculate the moles of CH COOH and NaOH before mixing.
b. Assuming the reaction goes to completion, calculate the moles of CH₂COOH and
CH COO present in the buffer solution.
c. Calculate the concentration of CH COOH and CH COO in the buffer solution.
d. Use the Henderson-Hasselbalch equation to calculate the expected pH of this buffer
solution. CH COOH K₂ = 1.8 x 10.
1) Consider HA (a strong acid) and HB (a strong base). a. Write a balanced chemical reaction for the ionization of HA in water. b. Determine the [H3O+], pH, pOH, and [OH– ] in a 0.00125 M HA solution. c. Write a balanced chemical reaction for the ionization of HB in water.
Chapter 9 Solutions
General, Organic, and Biological Chemistry (3rd Edition)
Ch. 9 - Prob. 9.1PPCh. 9 - Indicate if each of the following statements is...Ch. 9 - Prob. 9.3PPCh. 9 - Prob. 9.4PPCh. 9 - Prob. 9.5PPCh. 9 - In each of the following equations, identify the...Ch. 9 - Prob. 9.7PPCh. 9 - Prob. 9.8PPCh. 9 - Prob. 9.9PPCh. 9 - Which of the following are strong bases? a....
Ch. 9 - Prob. 9.11PPCh. 9 - Prob. 9.12PPCh. 9 - Prob. 9.13PPCh. 9 - Prob. 9.14PPCh. 9 - Complete and balance the following neutralization...Ch. 9 - Complete and balance the following neutralization...Ch. 9 - Prob. 9.17PPCh. 9 - Complete and balance the following neutralization...Ch. 9 - Prob. 9.19PPCh. 9 - Prob. 9.20PPCh. 9 - Write an equilibrium constant expression lor the...Ch. 9 - Prob. 9.22PPCh. 9 - Prob. 9.23PPCh. 9 - Prob. 9.24PPCh. 9 - Prob. 9.25PPCh. 9 - Sulfur trioxide is produced by reacting sulfur...Ch. 9 - Prob. 9.27PPCh. 9 - Prob. 9.28PPCh. 9 - Prob. 9.29PPCh. 9 - When you exercise, energy is produced by...Ch. 9 - Using Tables 9.1 and 9.6, identity the stronger...Ch. 9 - Using Tables 9.1 and 9.6, identify the stronger...Ch. 9 - Prob. 9.33PPCh. 9 - Identify the acid and base on the reactant side of...Ch. 9 - Prob. 9.35PPCh. 9 - Prob. 9.36PPCh. 9 - Prob. 9.37PPCh. 9 - Write the formula and name of the conjugate acid...Ch. 9 - Complete the following reactions and identify the...Ch. 9 - Complete the following reactions and identify the...Ch. 9 - State if each of the following solutions is...Ch. 9 - State if each of the following solutions is...Ch. 9 - State if each of these following solutions is...Ch. 9 - Slate if each of the following solutions is...Ch. 9 - Calculate the pH of each of the solutions in...Ch. 9 - Calculate the pH of each of the solutions in...Ch. 9 - Calculate the [H3O+] for each of the following...Ch. 9 - Calculate the [H3O+J lor each of the following...Ch. 9 - Prob. 9.49PPCh. 9 - Using Table 9.8, determine the stronger acid from...Ch. 9 - Prob. 9.51PPCh. 9 - Prob. 9.52PPCh. 9 - Prob. 9.53PPCh. 9 - Prob. 9.54PPCh. 9 - Valine has the zwitterion structure shown in the...Ch. 9 - Glycine has the zwitterion structure shown in the...Ch. 9 - Prob. 9.57PPCh. 9 - Prob. 9.58PPCh. 9 - During stress or trauma, a person can start to...Ch. 9 - A person who overdoses on antacids may neutralize...Ch. 9 - Prob. 9.61APCh. 9 - Prob. 9.62APCh. 9 - Prob. 9.63APCh. 9 - What are some ingredients found in antacids? What...Ch. 9 - Prob. 9.65APCh. 9 - Prob. 9.66APCh. 9 - Prob. 9.67APCh. 9 - Prob. 9.68APCh. 9 - For the following reaction, 2HI(g)H2(g)+I2(g) a....Ch. 9 - Prob. 9.70APCh. 9 - Prob. 9.71APCh. 9 - Prob. 9.72APCh. 9 - Prob. 9.73APCh. 9 - Prob. 9.74APCh. 9 - Prob. 9.75APCh. 9 - Prob. 9.76APCh. 9 - Determine the pH for the following solutions....Ch. 9 - Determine the pi! for the following solutions....Ch. 9 - Prob. 9.79APCh. 9 - Prob. 9.80APCh. 9 - Consider the acetic-acid buffer system with acetic...Ch. 9 - Consider the lactic-acid buffer with lactic acid,...Ch. 9 - In blood plasma, pH is maintained by the carbonic...Ch. 9 - Adding a few drops o! a strong add to water will...Ch. 9 - Consider the amino acid valine shown in its...Ch. 9 - Prob. 9.86CPCh. 9 - Prob. 9.87CPCh. 9 - Prob. 9.88CPCh. 9 - Prob. 9.89CPCh. 9 - Naproxen, the active ingredient in Aleve has the...Ch. 9 - To determine the concentration of an unknown weak...Ch. 9 - Explain why the following amino acid cannot exist...Ch. 9 - Prob. 1IA.1QCh. 9 - Prob. 1IA.2QCh. 9 - Prob. 1IA.3QCh. 9 - Prob. 1IA.4QCh. 9 - Prob. 1IA.5QCh. 9 - Provide the a. conjugate base of H2S. _______ b....Ch. 9 - If the lungs fail to expel normal amounts of CO2...Ch. 9 - If the lungs expel CO2 faster than normally...Ch. 9 - Prob. 2IA.3QCh. 9 - Prob. 2IA.4QCh. 9 - Prob. 1ICCh. 9 - Prob. 2ICCh. 9 - Prob. 3IC
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