Chemical Principles
8th Edition
ISBN: 9781337247269
Author: Steven S. Zumdahl; Donald J. DeCoste
Publisher: Cengage Learning US
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Chapter 7, Problem 162CP
Interpretation Introduction
Interpretation: The pH of the solution for
Concept Introduction:
The pH is defined as the measure of acidity or alkalinity of the solution, hydrogen ion concentration. When the pH value is less than 7 then it is acidic and the pH value is greater than 7 then it is base or alkaline solution.
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Propionic acid, HC3H5O2, has Ka= 1.34 x 10–5.
(a) What is the molar concentration of H3O+ in 0.15 M HC3H5O2 and the pH of the solution?
(b) What is the Kb value for the propionate ion, C3H5O2–?
(c) Calculate the pH of 0.15 M solution of sodium propionate, NaC3H5O2.
(d) Calculate the pH of solution that contains 0.12 M HC3H5O2 and 0.25 M NaC3H5O2.
4) A highly toxic hydrogen cyanide (HCN) is a weak acid. A chemical engineer plans to determine
pH of a 50 mL sample of HCN (0.10 M) in a titration process. To this end, she used 0.20 M NaOH
as a titrant in varying volumes. Calculate the pH of the solution at the following points:
(Ka for HCN=6.2×10-¹0)
(a) Before addition of NaOH (initial pH),
(b) After 10.00 mL of titrant addition,
(c) After 25.00 mL of titrant addition,
(d) After 50.00 mL of titrant addition.
Calculate the pH of a solution initially with 0.10 M
NaHSO4 and 0.10 M NH3.
Chapter 7 Solutions
Chemical Principles
Ch. 7 - Prob. 1DQCh. 7 - Differentiate between the terms strength and...Ch. 7 - Prob. 3DQCh. 7 - Prob. 4DQCh. 7 - Prob. 5DQCh. 7 - Prob. 6DQCh. 7 - Prob. 7DQCh. 7 - Prob. 8DQCh. 7 - Prob. 9DQCh. 7 - Prob. 10DQ
Ch. 7 - Prob. 11DQCh. 7 - Prob. 12DQCh. 7 - Prob. 13DQCh. 7 - Prob. 14DQCh. 7 - Prob. 15DQCh. 7 - Prob. 16DQCh. 7 - Prob. 17DQCh. 7 - Consider the autoionization of liquid ammonia:...Ch. 7 - The following are representations of acidbase...Ch. 7 - Prob. 20ECh. 7 - For each of the following aqueous reactions,...Ch. 7 - Write balanced equations that describe the...Ch. 7 - Write the dissociation reaction and the...Ch. 7 - Prob. 24ECh. 7 - Consider the following illustrations: Which beaker...Ch. 7 - Prob. 26ECh. 7 - Prob. 27ECh. 7 - Prob. 28ECh. 7 - Prob. 29ECh. 7 - Prob. 30ECh. 7 - Consider the reaction of acetic acid in water...Ch. 7 - Prob. 32ECh. 7 - Prob. 33ECh. 7 - Prob. 34ECh. 7 - Prob. 35ECh. 7 - Values of Kw as a function of temperature are as...Ch. 7 - Prob. 37ECh. 7 - Prob. 38ECh. 7 - Prob. 39ECh. 7 - Prob. 40ECh. 7 - Prob. 41ECh. 7 - Prob. 42ECh. 7 - Prob. 43ECh. 7 - A solution is prepared by adding 50.0 mL of 0.050...Ch. 7 - Prob. 45ECh. 7 - Prob. 46ECh. 7 - Prob. 47ECh. 7 - Prob. 48ECh. 7 - Calculate the concentration of all species present...Ch. 7 - Prob. 50ECh. 7 - Prob. 51ECh. 7 - Prob. 52ECh. 7 - Prob. 53ECh. 7 - Prob. 54ECh. 7 - A solution is prepared by dissolving 0.56 g of...Ch. 7 - At 25°C a saturated solution of benzoic acid (see...Ch. 7 - Prob. 57ECh. 7 - Prob. 58ECh. 7 - A solution contains a mixture of acids: 0.50 M HA...Ch. 7 - Prob. 60ECh. 7 - Prob. 61ECh. 7 - Prob. 62ECh. 7 - Prob. 63ECh. 7 - Prob. 64ECh. 7 - Prob. 65ECh. 7 - Trichloroacetic acid (CCl3CO2H) is a corrosive...Ch. 7 - Prob. 67ECh. 7 - Prob. 68ECh. 7 - Prob. 69ECh. 7 - Prob. 70ECh. 7 - Prob. 71ECh. 7 - Prob. 72ECh. 7 - Prob. 73ECh. 7 - Prob. 74ECh. 7 - Prob. 75ECh. 7 - Prob. 76ECh. 7 - Prob. 77ECh. 7 - Prob. 78ECh. 7 - Prob. 79ECh. 7 - Prob. 80ECh. 7 - Calculate the pH of a 0.20 M C2H5NH2 solution...Ch. 7 - Prob. 82ECh. 7 - Prob. 83ECh. 7 - Prob. 84ECh. 7 - Prob. 85ECh. 7 - Quinine (C20H24N2O2) is the most important...Ch. 7 - Prob. 87ECh. 7 - Prob. 88ECh. 7 - Prob. 89ECh. 7 - Prob. 90ECh. 7 - Prob. 91ECh. 7 - Prob. 92ECh. 7 - Prob. 93ECh. 7 - Prob. 94ECh. 7 - A typical vitamin C tablet (containing pure...Ch. 7 - Prob. 96ECh. 7 - Prob. 97ECh. 7 - Prob. 98ECh. 7 - Prob. 99ECh. 7 - Prob. 100ECh. 7 - Rank the following 0.10 M solutions in order of...Ch. 7 - Prob. 102ECh. 7 - Prob. 103ECh. 7 - Prob. 104ECh. 7 - Prob. 105ECh. 7 - Prob. 106ECh. 7 - Prob. 107ECh. 7 - Prob. 108ECh. 7 - Prob. 109ECh. 7 - Prob. 110ECh. 7 - Prob. 111ECh. 7 - Prob. 112ECh. 7 - Prob. 113ECh. 7 - Prob. 114ECh. 7 - Prob. 115ECh. 7 - Prob. 116ECh. 7 - Prob. 117ECh. 7 - Prob. 118ECh. 7 - Prob. 119ECh. 7 - Prob. 120ECh. 7 - Prob. 121ECh. 7 - Prob. 122ECh. 7 - Calculate the pH of a 7.0107M HCl solution.Ch. 7 - Calculate the pH of a 1.0107M solution of NaOHin...Ch. 7 - Prob. 125AECh. 7 - Prob. 126AECh. 7 - Prob. 127AECh. 7 - Prob. 128AECh. 7 - Hemoglobin (abbreviated Hb) is a protein that is...Ch. 7 - Prob. 130AECh. 7 - Prob. 131AECh. 7 - Prob. 132AECh. 7 - Prob. 133AECh. 7 - Prob. 134AECh. 7 - Prob. 135AECh. 7 - Prob. 136AECh. 7 - Prob. 137AECh. 7 - One mole of a weak acid HA was dissolved in 2.0 L...Ch. 7 - Prob. 139AECh. 7 - Prob. 140AECh. 7 - Prob. 141AECh. 7 - Will 0.10 M solutions of the following salts be...Ch. 7 - Prob. 143AECh. 7 - Prob. 144AECh. 7 - Prob. 145AECh. 7 - Prob. 146AECh. 7 - Prob. 147AECh. 7 - Prob. 148AECh. 7 - Prob. 149AECh. 7 - Prob. 150AECh. 7 - Prob. 151AECh. 7 - Prob. 152CPCh. 7 - Prob. 153CPCh. 7 - A typical solution of baking soda (sodium...Ch. 7 - Prob. 155CPCh. 7 - Prob. 156CPCh. 7 - Prob. 157CPCh. 7 - Prob. 158CPCh. 7 - Prob. 159CPCh. 7 - Prob. 160CPCh. 7 - Prob. 161CPCh. 7 - Prob. 162CPCh. 7 - Prob. 163CPCh. 7 - Prob. 164CPCh. 7 - Prob. 165CPCh. 7 - Prob. 166CPCh. 7 - Prob. 167CPCh. 7 - Prob. 168CPCh. 7 - Prob. 169MP
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- 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_forwardWhat is the pH of a solution that consists of 0.20 M ammonia, NH3, and 0.20 M ammonium chloride, NH4Cl?arrow_forwardA chemist wanted to determine the concentration of a solution of lactic acid, HC3H5O3. She found that the pH of the solution was 2.60. What was the concentration of the solution? The Kd of lactic acid is 1.4 104.arrow_forward
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- Calculate the maximum concentration of Mg2+ (molarity) that can exist in a solution of pH 12.00.arrow_forwardCalculate the pH of a 0.072 M aqueous solution of aluminum chloride, AlCl3. The acid ionization of hydrated aluminum ion is Al(H2O)63+(aq)+H2O(l)Al(H2O)5OH2+(aq)+H3O+(aq) and K4 is 1.4 103.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_forward
- Lactic acid, C3H6O3, occurs in sour milk as a result of the metabolism of certain bacteria. Calculate the pH of a solution of 56. mg lactic acid in 250. mL water. Ka for D-lactic acid is 1.5 × 10−4.arrow_forwardConsider all acid-base indicators discussed in this chapter. Which of these indicators would be suitable for the titration of each of these? (a) NaOH with HClO4 (b) acetic acid with KOH (c) NH3 solution with HBr (d) KOH with HNO3 Explain your choices.arrow_forwardWhat are the major species in solution after NaHSO4 is dissolved in water? What happens to the pH of the solution as more NaHSO4 is added? Why? Would the results vary if baking soda (NaHCO3) were used instead?arrow_forward
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