EBK CHEMISTRY: THE MOLECULAR NATURE OF
7th Edition
ISBN: 9781119513216
Author: HYSLOP
Publisher: JOHN WILEY+SONS INC.
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Chapter 16, Problem 23PE
Pyridine,
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HCN is a weak acid (?a=6.20×10^−10) , so the salt, KCN , acts as a weak base. What is the pH of a solution that is 0.0525 M in KCN at 25 °C?
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Chapter 16 Solutions
EBK CHEMISTRY: THE MOLECULAR NATURE OF
Ch. 16 - Prob. 1PECh. 16 - Practice Exercise 16.2
An aqueous solution of...Ch. 16 - Practice Exercise 16.3
Water draining from old...Ch. 16 - Because rain washes pollutants out of the air, the...Ch. 16 - Practice Exercise 16.5
Find the values of and ...Ch. 16 - Practice Exercise 16.6
Calculate the . (Hint: is...Ch. 16 - Practice Exercise 16.7
Calculate the , and pH in a...Ch. 16 - For each of the following acids, write the...Ch. 16 - For each of the following acids, write the...Ch. 16 - Practice Exercise 16.10 Use Table 16.2 to find all...
Ch. 16 - Practice Exercise 16.11 Two acids, H A and H B,...Ch. 16 - Practice Exercise 16.12 For each of the following...Ch. 16 - Practice Exercise 16.13 Write the ionization...Ch. 16 - Practice Exercise 16.14 The base methylamine...Ch. 16 - Practice Exercise 16.15
The value of for the
Ch. 16 - Practice Exercise 16.16 Salicylic acid reacts with...Ch. 16 - Practice Exercise 16.17 When butter turns rancid,...Ch. 16 - Practice Exercise 16.18 Few substances are more...Ch. 16 - A student planned an experiment that would use...Ch. 16 - Benzoic acid, HC6H5CO2, is a monoprotic add (only...Ch. 16 - Nicotinic acid, HC6H4NO2, is a B vitamin. It is...Ch. 16 - Aniline, C6H5NH2, is a precursor for many dyes...Ch. 16 - Pyridine, C5H5N, is a bad-smelling liquid for...Ch. 16 - Practice Exercise 16.24
Phenol is an acidic...Ch. 16 - Practice Exercise 16.25
Are solutions of acidic,...Ch. 16 - Are solutions of (a)NaNO3,(b)KF,and(c)NH4NO3...Ch. 16 - Practice Exercise 16.27
What is the pH of a...Ch. 16 - What is the pH of a 0.10 M solution of NaNO2?Ch. 16 - Practice Exercise 16.29
If 500.0 mL of a 0.20 M...Ch. 16 - Practice Exercise 16.30
Will an aqueous solution...Ch. 16 - Will an aqueous solution of ammonium nitrite,...Ch. 16 - Acetic acid, HC2H3O2, and sodium acetate, NaC2H3O2...Ch. 16 - For a buffer composed of NH3 and NH4+ (from...Ch. 16 - Practice Exercise 16.34
Calculate the pH of the...Ch. 16 - One liter of buffer is made by dissolving 100.0...Ch. 16 - Practice Exercise 16.36
From Table 16.2 select an...Ch. 16 - A chemist needed an aqueous buffer with a pH of...Ch. 16 - Practice Exercise 16.38
How much will the pH...Ch. 16 - Practice Exercise 16.39
A buffer is prepared by...Ch. 16 - Write the three ionization steps for phosphoric...Ch. 16 - Ascorbic acid (vitamin C) is a diprotic acid,...Ch. 16 - Sodium bicarbonate gives solutions that are...Ch. 16 - What is the pHofa0.20M solution of Na2SO3at25C?...Ch. 16 - Reasoning by analogy from what you learned about...Ch. 16 - When a weak acid such as acetic acid, HC2H3O2, is...Ch. 16 - Suppose we titrate 20.0 mL of 0.100 MHCHO2 with...Ch. 16 - Practice Exercise 16.47
Suppose 30.0 mL of is...Ch. 16 - Write the chemical equation for (a) the...Ch. 16 - How are acidic, basic, and neutral solutions in...Ch. 16 - At 25C, how are the pHandpOH of a solution related...Ch. 16 - Why do chemists use pH notation instead of the...Ch. 16 - Explain how acids and bases suppress the...Ch. 16 - Prob. 6RQCh. 16 - Could you use the p-notation for the concentration...Ch. 16 - List the strong acids.Ch. 16 - 16.9. What chemical property is central to our...Ch. 16 - 16.10. Explain the difference between strength and...Ch. 16 - How are strong bases identified?Ch. 16 - 16.12. Some strong bases can be used to safely...Ch. 16 - Explain why we can ignore the autoionization of a...Ch. 16 - 16.14 Write the general equation for the...Ch. 16 - Which diagram best represents a weak acid? A...Ch. 16 - Why do we use equilibrium constants, KaandKb, for...Ch. 16 - 16.17 Write the chemical equation for the...Ch. 16 - For each of the acids in Review Question 16.17...Ch. 16 - Write the general equation for the ionization of a...Ch. 16 - 16.20 Write the chemical equation for the...Ch. 16 - 16.21 For each of the bases in Review Question...Ch. 16 - The pKa of HCN is 9.31 and that of HF is 3.46....Ch. 16 - Write the structural formulas for the conjugate...Ch. 16 - 16.24 Write the structural formulas for the...Ch. 16 - 16.25 How is percentage ionization defined? Write...Ch. 16 - What criterion do we use to determine whether or...Ch. 16 - For which of the following are we permitted to...Ch. 16 - What is the quadratic formula? When is it...Ch. 16 - Aspirin is acetylsalicylic acid, a monoprotic acid...Ch. 16 - The Kb value of the oxalate ion,...Ch. 16 - Consider the following compounds and suppose that...Ch. 16 - Will an aqueous solution of AICl3 turn litmus red...Ch. 16 - A solution of hydrazinium acetate is slightly...Ch. 16 - Prob. 34RQCh. 16 - To form a buffer, two substances are needed. How...Ch. 16 - Write ionic equations that illustrate how each...Ch. 16 - 16.37. The hydrogen phosphate ion is able to act...Ch. 16 - 16.38. When sulfur dioxide, an air pollutant from...Ch. 16 - Which diagram best describes a diprotic acid with...Ch. 16 - Citric acid, found in citrus fruits, is a...Ch. 16 - What simplifying assumptions do we usually make in...Ch. 16 - 16.42. Write the equations for the chemical...Ch. 16 - What simplifying assumptions do we usually make in...Ch. 16 - Define the terms equivalence point and end point...Ch. 16 - Will the solution be acidic, neutral, or basic at...Ch. 16 - 16.46. Qualitatively, describe how an acid-base...Ch. 16 - 16.47 If you use methyl orange in the titration of...Ch. 16 - 16.48 Using the list of indicators in Table 16.7,...Ch. 16 - 16.49 Calculate the in each of the following...Ch. 16 - Calculate the [OH-],pH,andpOH for each of the...Ch. 16 - Calculate the molar concentrations of H+andOH- in...Ch. 16 - Calculate the molar concentrations of H+andOH- in...Ch. 16 - Calculate the molar concentrations of H+andOH- in...Ch. 16 - Calculate the molar concentrations of H+andOH- in...Ch. 16 - A certain brand of beer had a H+ concentration...Ch. 16 - A soft drink was put on the market with...Ch. 16 - A sample of Windex had a [OH-]=6.310-5molL-1. What...Ch. 16 - 16.58 Bases tend to be used for cleaning. A...Ch. 16 - Prob. 59RQCh. 16 - At the temperature of the human body, 37C, the...Ch. 16 - 16.61 The interaction of water droplets in rain...Ch. 16 - 16.62 Acid rain forms when rain falls through air...Ch. 16 - 16.63 What is the concentration of ? What is the...Ch. 16 - 16.64 What is the concentration of...Ch. 16 - 16.65 A sodium hydroxide solution is prepared by...Ch. 16 - 16.66 A solution was made by dissolving 0.837 g...Ch. 16 - 16.67 A solution of has a measured pH of 11.60....Ch. 16 - A solution of HCl has a pH of 2.50. How many grams...Ch. 16 - 16.69 In a 0.0020 M solution of , how many moles...Ch. 16 - 16.70 In a certain solution of HCl, the ionization...Ch. 16 - A solution was prepared with 2.64 micrograms of...Ch. 16 - What is the pH of a 3.0107M solution of HCl? What...Ch. 16 - 16.73 Rhododendrons are shrubs that produce...Ch. 16 - 16.74 As eggs age, the pH of the egg white...Ch. 16 - Prob. 75RQCh. 16 - The barbiturate ion, C4H3N2O3,hasKb=1.010-10 What...Ch. 16 - Iodic acid, HIO3, has a pKa of 0.77. (a) What arc...Ch. 16 - Lactic acid HC3H5O3, is responsible for the sour...Ch. 16 - *16.79 A 1.0 M solution of acetic acid has a pH of...Ch. 16 - *16.80 A 0.250 M solution of NH3 has a pH of...Ch. 16 - 16.81 A 0.20 M solution of a weak acid, HA, has a...Ch. 16 - 16.82 A 0.15 M Absolution of an acid found in milk...Ch. 16 - A 0.12 M solution of a weak base is 0.012%...Ch. 16 - 16.84 If a weak base is 0.030% ionized in 0.030...Ch. 16 - Iodic acid, HIO3, is an important oxidizing agent...Ch. 16 - 16.86 Chloroacetic acid, , is a stronger...Ch. 16 - 16.87 Ethylamine, , has a strong, pungent odor...Ch. 16 - Hydroxylamine, HONH2, like ammonia, is a Brnsted...Ch. 16 - *16.89 What are the concentrations of all the...Ch. 16 - What are the concentrations of all the solute...Ch. 16 - 16.91 Codeine, a cough suppressant extracted from...Ch. 16 - Pyridine, C5H5N, is a bad-smelling liquid that is...Ch. 16 - A solution of acetic acid has a pH of 2.54. What...Ch. 16 - How many moles of NH3 must be dissolved in water...Ch. 16 - * 16.95 What is the pH of a 0.0050 M solution of...Ch. 16 - *16.96 What is the pH of a 0.020 M solution of...Ch. 16 - The compound para-aminobenzoic acid (PABA) is a...Ch. 16 - 16.98 Barbituric acid, (which we will abbreviate...Ch. 16 - 16.99 Calculate the pH of . What is the centration...Ch. 16 - Calculate the pH of 0.40MKNO2. What is the...Ch. 16 - Calculate the pH of 0.15MCH3NH3Cl. For...Ch. 16 - Calculate the pH of 0.10 M hydrazinium chloride,...Ch. 16 - A 0.18 M solution of the sodium salt of nicotinic...Ch. 16 - 16.104 A weak base B forms the salt , composed of...Ch. 16 - Liquid chlorine bleach is really nothing more than...Ch. 16 - *16.106 The conjugate acid of a molecular base has...Ch. 16 - 16.107 What is the pH of a solution that contains...Ch. 16 - A buffer is prepared containing...Ch. 16 - Rework Review Problem 16.107 using the Kb for the...Ch. 16 - 16.110 Calculate the pH of the buffer in Review...Ch. 16 - By how much will the pH change if 0.025 mol of HCl...Ch. 16 - 16.112 By how much will the pH change if 25.0 mL...Ch. 16 - Certain proteolytic enzymes react in alkaline...Ch. 16 - *16.114 A hydrolytic enzyme consumes moles of...Ch. 16 - *16.115 What are the initial and final pH values...Ch. 16 - *16.116 What are the initial and final pH values...Ch. 16 - How many grams of sodium acetate, NaC2H3O2, would...Ch. 16 - 16.118 How many grams of sodium formate, , would...Ch. 16 - Suppose 30.00 mL of 0.100 M HCl is added to an...Ch. 16 - 16.120 How many milliliters of 0.15 MHCl would...Ch. 16 - Calculate the concentrations of all the solute...Ch. 16 - *16.122 Tellurium, in the same family as sulfur,...Ch. 16 - Calculate the concentrations of all of the solute...Ch. 16 - What is the pH of a 0.25 M solution of arsenic...Ch. 16 - Phosphorous acid, H3PO3, is actually a diprotic...Ch. 16 - 16.126 What is the pH of a 0.20 M solution of...Ch. 16 - Calculate the pH of 0.24MNa2SO3. What are the...Ch. 16 - *16.128 Calculate the pH of . What are the...Ch. 16 - 16.129 Sodium citrate, , is used as an...Ch. 16 - 16.130 What is the pH of a 0.25 M solution of...Ch. 16 - 16.131 What is the pH of a 0.50 M solution of ? In...Ch. 16 - *16.132 The pH of a solution is adjusted to 12.00...Ch. 16 - What is the pH of a solution prepared by mixing...Ch. 16 - *16.134 What is the pH of a solution prepared by...Ch. 16 - 16.135 When 50.0 mL of 0.050 M formic acid, , is...Ch. 16 - 16.136 When 25 mL of 0.12 M aqueous ammonia is...Ch. 16 - *16.137 For the titration of 75.00 mL of 0.1000 M...Ch. 16 - For the titration of 50.00 mL of 0.1000 M ammonia...Ch. 16 - *16.139 Calculate the percentage ionization of...Ch. 16 - *16.140 What is the pH of a solution that is and...Ch. 16 - A solution is prepared by mixing 325 mL of...Ch. 16 - *16.142 A solution is prepared by dissolving 15.0...Ch. 16 - For an experiment involving what happens to the...Ch. 16 - *16.144 Predict whether the pH of is greater...Ch. 16 - *16.145 What is the pH of a M solution of ammonium...Ch. 16 - How many milliliters of ammonia gas measured at...Ch. 16 - HClO4 is a stronger proton donor than HNO3, but in...Ch. 16 - 16.148 The hydrogen sulfate ion, , is a moderately...Ch. 16 - Some people who take megadoses of ascorbic acid...Ch. 16 - 16.150 For the titration of 25.00 mL of 0. ,...Ch. 16 - Below is a diagram illustrating a mixture HFandF-...Ch. 16 - *16.152 How many milliliters of must be added to...Ch. 16 - Milk of magnesia is a suspension of magnesium...Ch. 16 - 16.154 How many milliliters of are needed to...Ch. 16 - 16.155 It was found that 25.20 mL of an solution...Ch. 16 - Suppose 38.0 mL of 0.000200MHCl is added to 40.0...Ch. 16 - *16.157 Suppose 10.0 mL of gas at and 734 torr...Ch. 16 - *16.158 Suppose the HCl described in the preceding...Ch. 16 - *16.159 What is the approximate freezing point of...Ch. 16 - 16.160 What happens to the pH of a solution as it...Ch. 16 - Can the pH of a solution ever have a negative...Ch. 16 - In simplifying our calculations, we were satisfied...Ch. 16 - In the 1950s it was discovered that lakes in the...Ch. 16 - 16.164 Where are buffers found in everyday...Ch. 16 - Why must the acid used for a buffer have a pKa...Ch. 16 - What conjugate acid-base pairs are used to buffer...Ch. 16 - Your blood at 37C needs to be maintained within a...Ch. 16 - Develop a list of the uses of phosphoric acid in...Ch. 16 - What would our pH scale look like if Arrhenius...
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- A 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_forwardBarbituric acid, HC4H3N2O3, is used to prepare barbiturates, a class of drugs used as sedatives. A 325-mL aqueous solution of barbituric acid has a pH of 2.34 and contains 9.00 g of the acid. What is Ka for barbituric acid?arrow_forwardA solution of acetic acid, HC2H3O2, on a laboratory shelf was of undetermined concentration. If the pH of the solution was found to be 2.57, what was the concentration of the acetic acid? The Ka of acetic acid is 1.7 105.arrow_forward
- Convert the pK values to K values for the ionization of HCl, HClO4, and H2SO4 in glacial acetic acid. Rank these acids in order from strongest to weakest.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_forwardThe base ethylamine (CH3CH2NH2) has a Kb of. A closely related base, ethanolamine(HOCH2CH2NH2), has a Kb of 3.2105. (a) Which of the two bases is stronger? (b) Calculate the pH of a 0.10M solution of the strong base?arrow_forward
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