Principles of General, Organic, Biological Chemistry
2nd Edition
ISBN: 9780073511191
Author: Janice Gorzynski Smith Dr.
Publisher: McGraw-Hill Education
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Chapter 8, Problem 8.92AP
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Principles of General, Organic, Biological Chemistry
Ch. 8.1 - Name each acid: (a) HF; (b) HNO3; (c) HCN.Ch. 8.1 - Prob. 8.2PCh. 8.1 - Which of the following species can be BrnstedLowry...Ch. 8.1 - Which of the following species can be BrnstedLowry...Ch. 8.1 - Classify each reactant as a BrnstedLowry acid or...Ch. 8.2 - Draw the conjugate acid of each species: (a) H2O;...Ch. 8.2 - Draw the conjugate base of each species: (a) H2S;...Ch. 8.2 - Draw the structure of the conjugate base of each...Ch. 8.2 - Label the acid and the base and the conjugate acid...Ch. 8.2 - Ammonia, NH3, is amphoteric. (a) Draw the...
Ch. 8.2 - When ascorbic acid (vitamin C, molecular formula...Ch. 8.3 - Prob. 8.12PCh. 8.3 - Prob. 8.13PCh. 8.3 - Prob. 8.14PCh. 8.3 - Prob. 8.15PCh. 8.4 - Calculate the value of [OH] from the given [H3O+]...Ch. 8.4 - Calculate the value of [H3O+] from the given [OH]...Ch. 8.4 - Calculate the value of [H3O+] and [OH] in each...Ch. 8.5 - Convert each H3O+ concentration to a pH value. a....Ch. 8.5 - What H3O+ concentration corresponds to each pH...Ch. 8.5 - Prob. 8.21PCh. 8.5 - Prob. 8.22PCh. 8.6 - Write a balanced equation for each acidbase...Ch. 8.6 - Prob. 8.24PCh. 8.6 - Prob. 8.25PCh. 8.6 - Write a balanced equation for the reaction of...Ch. 8.7 - Prob. 8.27PCh. 8.7 - Prob. 8.28PCh. 8.8 - Prob. 8.29PCh. 8.8 - Prob. 8.30PCh. 8 - Draw the structure of the conjugate base of each...Ch. 8 - Draw the structure of the conjugate base of each...Ch. 8 - (a) Which of the following represents a strong...Ch. 8 - Prob. 8.34UKCCh. 8 - Identify the acid, base, conjugate acid, and...Ch. 8 - Prob. 8.36UKCCh. 8 - Prob. 8.37UKCCh. 8 - Prob. 8.38UKCCh. 8 - Prob. 8.39UKCCh. 8 - Prob. 8.40UKCCh. 8 - If a urine sample has a pH of 5.90, calculate the...Ch. 8 - Prob. 8.42UKCCh. 8 - Prob. 8.43UKCCh. 8 - Prob. 8.44UKCCh. 8 - Consider a buffer prepared from the weak acid HNO2...Ch. 8 - Prob. 8.46UKCCh. 8 - Prob. 8.47APCh. 8 - Prob. 8.48APCh. 8 - Prob. 8.49APCh. 8 - Prob. 8.50APCh. 8 - Prob. 8.51APCh. 8 - Prob. 8.52APCh. 8 - Draw the conjugate base of each acid. a. HNO2 b....Ch. 8 - Draw the conjugate base of each acid. a. H3O+ b....Ch. 8 - Prob. 8.55APCh. 8 - Prob. 8.56APCh. 8 - Prob. 8.57APCh. 8 - Like H2O, H2PO4 is amphoteric. (a) Draw the...Ch. 8 - Prob. 8.59APCh. 8 - Prob. 8.60APCh. 8 - Prob. 8.61APCh. 8 - Prob. 8.62APCh. 8 - Prob. 8.63APCh. 8 - Prob. 8.64APCh. 8 - Prob. 8.65APCh. 8 - Prob. 8.66APCh. 8 - Prob. 8.67APCh. 8 - Prob. 8.68APCh. 8 - Calculate the value of [OH] from the given [H3O+]...Ch. 8 - Calculate the value of [OH] from the given [H3O+]...Ch. 8 - Calculate the value of [H3O+] from the given [OH]...Ch. 8 - Prob. 8.72APCh. 8 - Prob. 8.73APCh. 8 - Calculate the pH from each H3O+ concentration...Ch. 8 - Prob. 8.75APCh. 8 - Prob. 8.76APCh. 8 - What are the concentrations of H3O+ and OH in...Ch. 8 - Prob. 8.78APCh. 8 - Prob. 8.79APCh. 8 - Prob. 8.80APCh. 8 - Prob. 8.81APCh. 8 - Prob. 8.82APCh. 8 - Prob. 8.83APCh. 8 - Prob. 8.84APCh. 8 - Prob. 8.85APCh. 8 - Prob. 8.86APCh. 8 - Prob. 8.87APCh. 8 - Prob. 8.88APCh. 8 - Consider a weak acid H2A and its conjugate base...Ch. 8 - Consider a weak acid H2A and its conjugate base...Ch. 8 - Prob. 8.91APCh. 8 - Prob. 8.92APCh. 8 - Prob. 8.93APCh. 8 - Prob. 8.94APCh. 8 - The optimum pH of a swimming pool is 7.50....Ch. 8 - A sample of rainwater has a pH of 4.18. (a)...Ch. 8 - Prob. 8.97APCh. 8 - Prob. 8.98APCh. 8 - Prob. 8.99APCh. 8 - Explain why a lake on a bed of limestone is...Ch. 8 - Prob. 8.101CP
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- Calculate [CO32] in a 0.010-M solution of CO2 in water (usually written as H2CO3). If all the CO32 in this solution comes from the reaction HCO3(aq)H+(aq)+CO32(aq) what percentage of the H+ ions in the solution is a result of the dissociation of HCO3? When acid is added to a solution of sodium hydrogen carbonate (NaHCO3), vigorous bubbling occurs. How is this reaction related to the existence of carbonic acid (H2CO3) molecules in aqueous solution?arrow_forwardAn important component of blood is the buffer combination of bicarbonate ion and carbonic acid. Consider blood with a pH of 7.42. a What is the ratio of [H2CO3] to [HCO3]? b What does the pH become if 15% of the bicarbonate ions are converted to carbonic acid? c What does the pH become if 25% of the carbonic acid molecules are converted to bicarbonate ions?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
- What is a salt? List some anions that behave as weak bases in water. List some anions that have no basic properties in water. List some cations that behave as weak acids in water. List some cations that have no acidic properties in water. Using these lists, give some formulas for salts that have only weak base properties in water. What strategy would you use to solve for the pH of these basic salt solutions? Identify some salts that have only weak acid properties in water. What strategy would you use to solve for the pH of these acidic salt solutions? Identify some salts that have no acidic or basic properties in water (produce neutral solutions). When a salt contains both a weak acid ion and a weak base ion, how do you predict whether the solution pH is acidic, basic, or neutral?arrow_forwardA friend asks the following: Consider a buffered solution made up of the weak acid HA and its salt NaA. If a strong base like NaOH is added, the HA reacts with the OH to form A. Thus the amount of acid (HA) is decreased, and the amount of base (A) is increased. Analogously, adding HCI to the buffered solution forms more of the acid (HA) by reacting with the base (A). Thus how can we claim that a buffered solution resists changes in the pH of the solution? How would you explain buffering to this friend?arrow_forwardOne of the most challenging parts of solving acidbase problems is writing out the correct equation. When a strong acid or a strong base is added to solutions, they are great at what they do, and we always react them first. If a strong acid is added to a buffer, what reacts with the H+ from the strong acid and what are the products? If a strong base is added to a buffer, what reacts with the OH from the strong base and what are the products? Problems involving the reaction of a strong acid or strong base are assumed to be stoichiometry problems and not equilibrium problems. What is assumed when a strong acid or strong base reacts to make it a stoichiometry problem?arrow_forward
- Strong 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_forwardA solution made up of 1.0 M NH3 and 0.50 M (NH4)2SO4 has a pH of 9.26. a Write the net ionic equation that represents the reaction of this solution with a strong acid. b Write the net ionic equation that represents the reaction of this solution with a strong base. c To 100. mL of this solution, 10.0 mL of 1.00 M HCl is added. How many moles of NH3 and NH4+ are present in the reaction system before and after the addition of the HCl? What is the pH of the resulting solution? d Why did the pH change only slightly upon the addition of HCl?arrow_forwardExplain why the pH does not change significantly when a small amount of an acid or a base is added to a solution that contains equal amounts of the base NH3 and a salt of its conjugate acid NH4CI.arrow_forward
- Salicylic 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_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
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