EBK CHEMISTRY
8th Edition
ISBN: 9780135216972
Author: Robinson
Publisher: PEARSON CO
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Textbook Question
Chapter 16, Problem 16.99SP
A typical aspirin tablet contains 324 mg of aspirin (acetylsalicylic acid,
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The values of K a for hydrozoic acid ( HN 3) and hypobromous acid (HB1O) are given below.
HN3
Ką = 1.9 x 10-5
HBrO
Ka = 2.0 x 10-9
If we mix 0.50 mol HN 3 and 0.50 mol NaBrO into a 1-L aqueous solution, which of the following statements is
correct concerning the final solution at cquilibrium after mixing?
O a. The pH of the final solution is greater than 7 because Ką (HN3) K½(BrO").
O . The pH of the final solution is equal to 7 because the neutralization reaction between HN3 and NaBro.
d. The pH of the final solution is less than 7 because Ką (HN3) > Kh( BrO" ).
O e. The pH of the final solution is less than 7 because Ką (HN3) < K,( BrO" ).
What is the pH of a solution prepared by mixing 100. mL of 0.0500 M HCl with 300. mL of 0.500 M HF? [Ka(HF) = 7.1 × 10–4]
Aniline, C6H5NH2, is a weak base that is commonly used in the preparation of precursors for polyurethane
production. The K, value of aniline is 4.3 × 10-10. If you titrate a 60.0 mL solution of 0.280 M aniline, with
0.375 M HCl, answer each of the questions below:
a) How many moles of aniline are present in the original solution?
C6H5NH :0.0168
b) What is the volume of the equivalence point, Veq, for the titration in litres, L?
Veq : 0.0448
c) What is the pH at the equivalence point?
pH:
mol
L
Chapter 16 Solutions
EBK CHEMISTRY
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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- 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_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_forwardUsing the diagrams shown in Problem 10-117, which of the solutions would have the greatest buffer capacity, that is, greatest protection against pH change, when the following occurs? a. A strong acid is added to the solution. b. A strong base is added to the solution.arrow_forward
- 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_forwardSalicylic acid, C6H4OHCOOH, is used in the manufacture of acetylsalicylic acid (aspirin) and methyl salicylate (wintergreen flavor). A saturated solution of salicylic acid contains 2.2 g of the acid per liter of solution and has a pH of 2.43. What is the value of Ka?arrow_forwardGiven the acid-base indicators in Question 37, select a suitable indicator for the following titrations. (a) sodium formate (NaCHO2) with HNO3 (b) hypochlorous acid with barium hydroxide (c) nitric acid with HI (d) hydrochloric acid with ammoniaarrow_forward
- Consider 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 is the pH of a solution that consists of 0.20 M ammonia, NH3, and 0.20 M ammonium chloride, NH4Cl?arrow_forwardMalic acid is a weak diprotic organic acid with Ka1 = 4.0 104 and Ka2 = 9.0 105. a Letting the symbol H2A represent malic acid, write the chemical equations that represent Ka1 and Ka2. Write the chemical equation that represents Ka1 Ka2. b Qualitatively describe the relative concentrations of H2A, HA, A2, and H3O+ in a solution that is about one molar in malic acid. c Calculate the pH of a 0.0175 M malic acid solution and the equilibrium concentration of [H2A]. d What is the A2 concentrationin in solutions b and c?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_forwardStrong Acids, Weak Acids, and pH Two 0.10-mol samples of the hypothetical monoprotic acids HA(aq) and HB(aq) are used to prepare 1.0-L stock solutions of each acid. a Write the chemical reactions for these acids in water. What are the concentrations of the two acid solutions? b One of these acids is a strong acid, and one is weak. What could you measure that would tell you which acid was strong and which was weak? c Say that the HA(aq) solution has a pH of 3.7. Is this the stronger of the two acids? How did you arrive at your answer? d What is the concentration of A(aq) in the HA solution described in part c? e If HB(aq) is a strong acid, what is the hydronium-ion concentration? f In the solution of HB(aq), which of the following would you expect to be in the greatest concentration: H3O+(aq), B(aq), HB(aq), or OH(aq)? How did you decide? g In the solution of HA(aq), which of the following would you expect to be in the greatest concentration: H3O+(aq), A+(aq), HA(aq), or OH(aq)? How did you decide? h Say you add 1.0 L of pure water to a solution of HB. Would this water addition make the solution more acidic, make it less acidic, or not change the acidity of the original solution? Be sure to fully justify your answer. i You prepare a 1.0-L solution of HA. You then take a 200-mL sample of this solution and place it into a separate container. Would this 200 mL sample be more acidic, be less acidic, or have the same acidity as the original 1.0-L solution of HA(aq)? Be sure to support your answer.arrow_forwardTwo strategies are also followed when solving for the pH of a base in water. What is the strategy for calculating the pH of a strong base in water? List the strong bases mentioned in the text that should be committed to memory. Why is calculating the pH of Ca(OH)2 solutions a little more difficult than calculating the pH of NaOH solutions? Most bases are weak bases. The presence of what element most commonly results in basic properties for an organic compound? What is present on this element in compounds that allows it to accept a proton? Table 13-3 and Appendix 5 of the text list Kb values for some weak bases. What strategy is used to solve for the pH of a weak base in water? What assumptions are made when solving for the pH of weak base solutions? If the 5% rule fails, how do you calculate the pH of a weak base in water?arrow_forward
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