CHEMISTRY-TEXT
8th Edition
ISBN: 9780134856230
Author: Robinson
Publisher: PEARSON
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Textbook Question
Chapter 16, Problem 16.91SP
Lactic acid
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Lactic acid, HC3H5O3, is a weak acid; write an equation for its ionization in aqueous solution. If 0.15 M solution of lactic acid has pH = 2.34, calculate the molar concentration of H3O+in the solution. What are the Ka of lactic acid and the degree of ionization of the acid?
30. In the reaction
HCl(aq) + H₂O(l) ⇒Cl¯(aq)+ H3O+ (aq)
does water act as a Brønsted-Lowry acid, a Brønsted-Lowry base, or neither, or
both?
(A) Neither as an acid nor as a base; water is neutral
(B) Both an acid and a base.
(C) An acid
(D) A base
(E) Depends temperature
What is the conjugate base of boric acid, B(OH)3?
(A) OH–
(B) B(OH)4–
(C) B(O)(OH)22–
(D) B(H2O)(OH)2+
Chapter 16 Solutions
CHEMISTRY-TEXT
Ch. 16 - Write a balanced equation for the dissociation of...Ch. 16 - Write the reaction between the carbonate ion...Ch. 16 - Conceptual PRACTICE 15.3 For the following...Ch. 16 - Conceptual APPLY 15.4 For the following reactions...Ch. 16 - If you mix equal concentrations of reactants and...Ch. 16 - Conceptual APPLY 15.6 The following pictures...Ch. 16 - Which pair has the stronger acid listed first? H2S...Ch. 16 - Which acid is stronger, H3PO4orH3AsO4?Ch. 16 - PRACTICE 15.9 The concentration of H3O+ ions in...Ch. 16 - Calculate the pH of a sample of seawater that has...
Ch. 16 - During mining operations, the mineral pyrite...Ch. 16 - Calculate the concentrations of H3O+ and OH- in a...Ch. 16 - Calculate the pH of the following solutions: (a)...Ch. 16 - Calculate the pH of a solution prepared by...Ch. 16 - The following pictures represent aqueous solutions...Ch. 16 - Acetic acid, CH3CO2H, is the solute that gives...Ch. 16 - Wha concentration of formic acid will result in a...Ch. 16 - Calculate the pH and the concentration of all...Ch. 16 - Carbonated drinks are prepared by dissolving CO2...Ch. 16 - Calculate the pH and the concentrations of all...Ch. 16 - Lactated Ringers solution is given intravenously...Ch. 16 - Prob. 16.25PCh. 16 - The following pictures represent aqueous solutions...Ch. 16 - Predict whether a solution of 0.20 M NaNO2 is...Ch. 16 - Calculate the pH and percent dissociation of...Ch. 16 - Prob. 16.29PCh. 16 - For the following Lewis acid— base reaction, draw...Ch. 16 - What are the chemical formulas and names of the...Ch. 16 - What were the average pH ranges for rainfall in...Ch. 16 - Prob. 16.33PCh. 16 - (a) Natural or “unpolluted” rain has a pH of 5.6....Ch. 16 - Prob. 16.35PCh. 16 - Prob. 16.36PCh. 16 - Because sulfur and nitrogen oxides are the main...Ch. 16 - Prob. 16.38CPCh. 16 - The following pictures represent aqueous solutions...Ch. 16 - Locate sulfur, selenium, chlorine, and bromine in...Ch. 16 - Prob. 16.41CPCh. 16 - Prob. 16.42CPCh. 16 - The followign pictures represent solutions of...Ch. 16 - Prob. 16.44CPCh. 16 - Look at the electron-dot structures of the...Ch. 16 - Boric acid (H3BO3) is a weak monoprotic acid that...Ch. 16 - Prob. 16.47CPCh. 16 - Prob. 16.48SPCh. 16 - Which of the following can behave both as a...Ch. 16 - Give the formula for the conjugate base of each of...Ch. 16 - Give the formula for the conjugate acid of each of...Ch. 16 - For each of the following reactions, identify the...Ch. 16 - For each of the following reactions, identify the...Ch. 16 - Aqueous solutions of hydrogen sulfide contain...Ch. 16 - Prob. 16.55SPCh. 16 - Choose from the conjugate acid-base pairs...Ch. 16 - Prob. 16.57SPCh. 16 - Prob. 16.58SPCh. 16 - Prob. 16.59SPCh. 16 - Arrange each group of compounds in order of...Ch. 16 - Arrange each group of compounds in order of...Ch. 16 - Prob. 16.62SPCh. 16 - Identify the weakest acid in each of the following...Ch. 16 - Prob. 16.64SPCh. 16 - Identify the stronger base in each of the...Ch. 16 - Prob. 16.66SPCh. 16 - Prob. 16.67SPCh. 16 - The concentration of OH- in a sample of seawater...Ch. 16 - The concentration of OH- in human blood is...Ch. 16 - For each of the following solutions, calculate...Ch. 16 - For each of the following solutions, calculate...Ch. 16 - Water superheated under pressure to 200oC and 750...Ch. 16 - Water at 500oC and 250 atm is a supercritical...Ch. 16 - Calculate the pH to the correct number of...Ch. 16 - Calculate the pH to the correct number of...Ch. 16 - Calculate the H3O+ concentration to the correct...Ch. 16 - Calculate the H3O+ concentration to the correct...Ch. 16 - Prob. 16.78SPCh. 16 - Which of the indicators given in Figure 16.5,...Ch. 16 - Which of the following species behave a strong...Ch. 16 - Which of the following species behave as strong...Ch. 16 - Calculate the pH of the following solutions:...Ch. 16 - Calculate the pH of the following solutions: 0.48...Ch. 16 - Prob. 16.84SPCh. 16 - Calculate the pH of solutions prepared by: RAN (a)...Ch. 16 - How many grams of CaO should be dissolved in...Ch. 16 - Prob. 16.87SPCh. 16 - Look up the value of Ka in Appendix C for...Ch. 16 - Look up the value of Ka in Appendix C for...Ch. 16 - The pH of 0.040 M hypobromous acid (HOBr) is 5.05....Ch. 16 - Lactic acid (C3H6O3) , which occurs in sour milk...Ch. 16 - The pH of 0.050 M gallic acid, an acid found in...Ch. 16 - The pH of 0.040 M pyruvic acid, an acid found in...Ch. 16 - A vitamin C tablet containing 250 mg of ascorbic...Ch. 16 - Acetic acid (CH3COOH;Ka=1.810-5) has a...Ch. 16 - Acrylic acid (HC3H3O2) is used in the manufacture...Ch. 16 - Hippuric acid (HC9H8NO3) , found in horse urine,...Ch. 16 - Calculat the pH and the percent dissociation in...Ch. 16 - A typical aspirin tablet contains 324 mg of...Ch. 16 - Prob. 16.100SPCh. 16 - Calculate the percent dissociation of...Ch. 16 - Write balanced net ionic equations and the...Ch. 16 - Write balanced net ionic equations and the...Ch. 16 - Calculate the pH and the concentrations of all...Ch. 16 - Prob. 16.105SPCh. 16 - Prob. 16.106SPCh. 16 - Tartaric acid (C4H6O6) is a diprotic acid that...Ch. 16 - Like sulfuric acid, selenic acid (H2SeO4) is a...Ch. 16 - Calculate the concentrations of H3O+ and SO42- in...Ch. 16 - Prob. 16.110SPCh. 16 - Prob. 16.111SPCh. 16 - Write a balanced net ionic equation and the...Ch. 16 - Write a balanced net ionic equation and the...Ch. 16 - Styrchine (C21H22N2O2) , a deadly poison used for...Ch. 16 - What is the pH of 0.5 M ammonia (NH3)?(Kb=1.8105)Ch. 16 - Morphine (C17H19NO3), a narcotic used in...Ch. 16 - A 1.00103M solution of quinine, a drug used in...Ch. 16 - Oxycodone (C18H21NO4), a narcotic analgesic, is a...Ch. 16 - Morpholine (C4H9NO) is a weak organic base with...Ch. 16 - Using values of Kb in Appendix C, calculate values...Ch. 16 - Using values of Ka in Appendix C, calculate values...Ch. 16 - Prob. 16.122SPCh. 16 - Sodium benzoate (C6H5CO2Na) is used as a food...Ch. 16 - Write a balanced net ionic equation for the...Ch. 16 - Write a balanced net ioflk equation for the...Ch. 16 - Classify each of the following ions according to...Ch. 16 - Classify each of the following salt solutions as...Ch. 16 - Calculate the concentrations of all species...Ch. 16 - Prob. 16.129SPCh. 16 - Calculate Ka for the cation Kb for the anion in an...Ch. 16 - Classify each of the following salt solutions as...Ch. 16 - Prob. 16.132SPCh. 16 - Classify each of the following salt solutions as...Ch. 16 - Calculate the pH and the concentrations of all...Ch. 16 - Calculate the pH and the percent dissociation of...Ch. 16 - Prob. 16.136SPCh. 16 - Prob. 16.137SPCh. 16 - Prob. 16.138SPCh. 16 - For each of the following reactions, identify the...Ch. 16 - Prob. 16.140SPCh. 16 - For each of the Lewis acid—base reactions in...Ch. 16 - Prob. 16.142SPCh. 16 - Prob. 16.143SPCh. 16 - Prob. 16.144MPCh. 16 - Prob. 16.145MPCh. 16 - Prob. 16.146MPCh. 16 - Prob. 16.147MPCh. 16 - Normal rain has a pH of 5.6 due to dissolved...Ch. 16 - Sulfur dioxide is quite soluble in water:...Ch. 16 - Prob. 16.150MPCh. 16 - Acid and base behavior can be observed in solvents...Ch. 16 - Prob. 16.152MPCh. 16 - In the case of very weak acids, [H3O+] from the...Ch. 16 - Prob. 16.154MPCh. 16 - Prob. 16.155MPCh. 16 - Neutralization reactions involving either a strong...Ch. 16 - Prob. 16.157MPCh. 16 - Prob. 16.158MPCh. 16 - A 200.0 mL sample of 0.350 M acetic acid (CH3CO2H)...Ch. 16 - Prob. 16.160MP
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- Find the value of Kb for the conjugate base of the following organic acids. (a) picric acid used in the manufacture of explosives; Ka = 0.16 (b) trichloroacetic acid used in the treatment of warts; Ka = 0.20arrow_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_forwardWhich is the stronger of the following two acids? (a) acetic acid, CH3CO2H, Ka = 1.8 105 (b) chloroacetic acid, ClCH2CO2H, pKa = 2.85arrow_forward
- Consider these acids (a) Arrange the acids in order of increasing acid strength from weakest to strongest. (b) Which acid has the smallest pKa value?arrow_forwardLactic 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_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
- A 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_forwardFind the value of Kb for the conjugate base of the following organic acids. (a) picric acid used in the manufacture of explosives; K a =0.16 (b) trichloroacetic acid used in the treatment of warts; K a =0.20arrow_forwardCalculate the pKa value for each of the following acids. a. Nitrous acid (HNO2), Ka = 4.5 104 b. Carbonic acid (H2CO3), Ka = 4.3 107 c. Dihydrogen phosphate ion (H2PO4), Ka = 6.2 108 d. Sulfurous acid (H2SO3), Ka = 1.5 102arrow_forward
- What is the pH of a 0.10 M solution of oxalic acid, H2C2C4? What are the concentrations of H3O+, HC2O4, and the oxalate ion, C2O42? (See Appendix H for Ka values.)arrow_forwardCaproic acid, HC6H11O2, is found in coconut oil and is used in making artificial flavors. A 2.00-L solution of caproic acid has a pH of 2.77 and contains 52.3 g of caproic acid. What is Ka for caproic acid?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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