Problem 1QAP: For each of the following reactions, indicate the Brønsted-Lowry acids and bases. What are the... Problem 2QAP: Follow the direction for Question 1 for the following reaction? (a) CN(aq)+H2OHCN(aq)+OH(aq) (b)... Problem 3QAP: According to the Brønsted-Lowry theory, which of the following would you expect to act as an acid?... Problem 4QAP: According to the Brønsted-Lowry theory, which of the following would you expect to act as an acid?... Problem 5QAP: Give the formula of the conjugate acid of (a) OH- (b) HPO42- (c) NH3 (d) F- (e) Zn(H2O)2(OH)2 Problem 6QAP: Give the formula for the conjugate base of (a) H2AsO4- (b) Fe(H2O)5(OH)+(c) HClO3 (d) NH4+ (e)... Problem 7QAP: Write a balanced equation showing how the H2PO4- ion can be either a Brønsted-Lowry acid or a... Problem 8QAP: Follow the instructions of Question 7 for the hydrogen carbonate ion, HCO3-. Problem 9QAP: Using the Brønsted-Lowry model, write equations to show why the following species behave as weak... Problem 10QAP Problem 11QAP: Using the Brønsted-Lowry model, write an equation to show why each of the following species... Problem 12QAP Problem 13QAP: Find the pH of solutions with the following[ H+ ]. Classify each as acidic or basic. (a) 6.0M(b)... Problem 14QAP: Find the pH of solutions with the following[ H+ ]. Classify each as acidic or basic. (a) 2.7103M(b)... Problem 15QAP: Calculate H+ and OH- and in solutions with the following pH. (a) 9.0(b) 3.20 (c) -1.05 (d) 7.46 Problem 16QAP: Calculate [H+] and [OH-] in solutions with the following pH. (a) -0.76(b) 9.11 (c) 3.81 (d) 12.08 Problem 17QAP: Complete the following table for solutions at 25C. Problem 18QAP: Complete the following table for solutions at 25C. Problem 19QAP: Solution 1 has [ H+ ]=1.7102 M. Solution 2 has [ H+ ]=4.3104M. Which solution is more acidic? Which... Problem 20QAP: Solution R has pH 13.42. Solution Q has [ OH ]=0.16 M. Which solution is more basic? Which has the... Problem 21QAP: Consider three solutions, R, Z, and Q. • Solution R has[ H+ ]=0.0134. • Solution Z has a pH 6... Problem 22QAP: Solution A has a pH of 12.32. Solution B has [H+] three times as large as that of solution A.... Problem 23QAP: Unpolluted rain water has a pH of about 5.5. Acid rain has been shown to have a pH as low as 3.0.... Problem 24QAP: Most cola soft drinks have a pH of 3.1. Green tea has a pH of 5.8. (a) Calculate [H+] for the cola... Problem 25QAP: Find [OH-] and the pH of the following solutions. (a) 0.25 g of Ba(OH)2 dissolved in enough water to... Problem 26QAP: Find [H+] and the pH of the following solutions. (a) A 456-mL sample of a 12.0% (by mass) solution... Problem 27QAP: Find [OH+], [OH-] and the pH of the following solutions. (a) 30.0 mL of a 0.216 M solution of HCI... Problem 28QAP: Find [OH-], [H+], and the pH of the following solutions. (a) Thirty-eight mL of a 0.106 M solution... Problem 29QAP: How many grams of HI should be added to 265 mL of 0.215 M HCI so that the resulting solution has a... Problem 30QAP: What is the pH of a solution obtained by adding 145 mL of 0.575 M HCI to 493 mL of a HNO3 solution... Problem 31QAP: What is the pH of a solution obtained by adding 13.0 g of NaOH to 795 mL of a 0.200 M solution of... Problem 32QAP: What is the pH of a solution obtained by mixing 235 mL of NaOH with a pH of 11.57 and 316 mL of... Problem 33QAP: Write the ionization equation and the Ka for each of the following acids. (a) AsH4+(b) H2C3H5O7- (c)... Problem 34QAP: Write the ionization equation and the Ka expression for each of the following acids. (a) HSO3-(b)... Problem 35QAP: Calculate Ka for the weak acids that have the following PKa values. (a) 3.9(b) 10.12 (c) 13.07 Problem 36QAP Problem 37QAP Problem 38QAP: Consider these acids (a) Arrange the acids in order of increasing acid strength from weakest to... Problem 39QAP: Rank the following solutions in order of increasing [H+]. (Use Table 13.2.) 0.1 M HNO3, 0.1 M HNO2,... Problem 40QAP: Rank the following acids (M=0.10)in order of decreasing[ H+ ]: HFHCl HCN HCIO Problem 41QAP Problem 42QAP: Rank the solutions in Questions 40 in order of increasing pH. Problem 43QAP: The pH of a 0.129 M solution of a weak acid, HB, is 2.34. What is Ka for the weak acid? Problem 44QAP: The pH of a 2.642 M solution of a weak acid, HB, is 5.32. What is Ka for the weak acid? Problem 45QAP: Paraminobenzene (PABA), HC7H6NO2, is used in some sunscreens. A solution is made up of 0.263 mol... Problem 46QAP: Acetaminophen, HC8H8NO2 (MM=151.17g/mol), is the active ingredient in Tyleno®, a common pain... Problem 47QAP: Caproic acid, HC6H11O2, is found in coconut oil and is used in making artificial flavors. A 2.00-L... Problem 48QAP: Barbituric acid, HC4H3N2O3, is used to prepare barbiturates, a class of drugs used as sedatives. A... Problem 49QAP: When aluminum chloride dissolves in water, Al(H2O)63+and Cl- ions are obtained. Using the Ka in... Problem 50QAP: Using the Ka values in Table 13.2, calculate the pH of a 0.47 M solution of sodium hydrogen sulfite.... Problem 51QAP: Barbituric acid, HC4H3N2O3, is used to prepare barbiturates, a class of drugs used as sedatives. Its... Problem 52QAP: Penicillin(MM=356g/mol), an antibiotic often used to treat bacterial infections, is a weak acid. Its... Problem 53QAP: Gallic acid, HC7H5O5, an ingredient in some ointments used to treat psoriasis. Its Ka is 3.9105. For... Problem 54QAP: Anisic acid (K a=3.38105) is found in anise seeds and is used as a flavoring agent. For a 0.279 M... Problem 55QAP: Phenol, once known as carbolic acid, HC6H5O, is a weak acid. It was one of the first antiseptics... Problem 56QAP: Benzoic acid (K a=6.6105)is present in many berries. Calculate the pH and % ionization of a 726-mL... Problem 57QAP: Chromic acid, H2CrO4, is commonly obtained by adding concentrated H2SO4 to a dichromate. It is used... Problem 58QAP: Consider citric acid, H3C6H5O7, added to many soft drinks. The equilibrium constants for its... Problem 59QAP: Consider a 0.45 M solution of ascorbic acid,H2C6H6O6, one form of Vitamin C.... Problem 60QAP: Consider a 0.33 M solution of the diprotic acid H2X. H2X H+(aq)+ HX(aq)Ka1=3.3 10 4 HX H+(aq)+... Problem 61QAP: Phthalic acid H2C8H4O4, is a diprotic acid. It is used to make phenolphthalein indicator.... Problem 62QAP: Selenious acid, H2SeO3, is primarily used to chemically darken copper, brass, and bronze. It is a... Problem 63QAP: Write the ionization expression and the Kb expression for 0.1 M solutions of the following bases:... Problem 64QAP: Follow the instructions for Question 63 for the following bases. (a) NH3 (b) HS- (c) (CH3)3N Problem 65QAP Problem 66QAP: Follow the directions of Question 65 for the following bases: (a) SO32- (b) CHO2- (c) NO2- Problem 67QAP: Using the equilibrium constants listed in Table 13.2, arrange the following 0.1 M aqueous solutions... Problem 68QAP: Using the equilibrium constants listed in Table 13.2, arrange the following 0.1 M aqueous solutions... Problem 69QAP: Find the value of Kb for the conjugate base of the following organic acids. (a) picric acid used in... Problem 70QAP: Find the values of Kb for the conjugate bases of the following organic acids: (a) glycolic acid,... Problem 71QAP: Determine [OH-], pOH and pH of a 0.28 M aqueous solution of Na2CO3. Problem 72QAP: Determine the [OH-] and pH of a 0.72 M solution of NaHCO3. Problem 73QAP: Codeine (Cod), a powerful and addictive painkiller, is a weak base. (a) Write a reaction to show its... Problem 74QAP: Consider pyridine, C5H5N, a pesticide and deer repellent. Its conjugate acid, C5H5NH+, has K a... Problem 75QAP: A solution of baking soda, NaHCO3, has a pH of 10.08. What is the percent (by mass) of NaHCO3 in a... Problem 76QAP: A solution of sodium cyanide, NaCN, has a pH of 12.10. How many grams of NaCN are in 425 mL of a... Problem 77QAP: Write formulas for two salts that (a) contain Ni3+ and are acidic. (b) contain Na+ and are basic.... Problem 78QAP: Write formulas for two salts that (a) contain NH4+ and are basic. (b) contain CO32- and are basic.... Problem 79QAP: State whether 1 M solutions of the following salts in water are acidic, basic, or neutral. (a) K2CO3... Problem 80QAP: State whether 1 M solutions of the following salts in water would be acidic, basic, or neutral. (a)... Problem 81QAP: Write net ionic equations to explain the acidity or basicity of the various salts listed in Question... Problem 82QAP Problem 83QAP: Arrange the following aqueous 0.1 M solutions in order of decreasing pH (highest to lowest).... Problem 84QAP: Arrange the following aqueous 0.1 M solutions in order of increasing pH (lowest to highest). ZnBr2... Problem 85QAP: Unclassified At 25C, a 0.20 M solution of methylamine, CH3NH2, is 5.0% ionized. What is Kb for... Problem 86QAP Problem 87QAP: There are 324 mg of acetylsalicylic acid (MM=180.15g/mol) per aspirin tablet. If two tablets are... Problem 88QAP: A student is asked to bubble enough ammonia gas through water to make 4.00 L of an aqueous ammonia... Problem 89QAP Problem 90QAP: A student prepares 455 mL of a KOH solution, but neglects to write down the mass of KOH added. His... Problem 91QAP: Consider the process H2O H+(aq)+OH(aq)H=55.8kJ (a) Will the pH of pure water at body temperature... Problem 92QAP: Household bleach is prepared by dissolving chlorine in water. Cl2(g)+H2O H+(aq)+Cl(aq)+HOCl(aq) Ka... Problem 93QAP: A tablet with a mass of 4.08 g contains 71.2% NaHCO3. It is recommended for heartburn relief. If the... Problem 94QAP: Consider a weak organic base (nonelectrolyte) with molar mass 281 g/mol. An aqueous solution of the... Problem 95QAP Problem 96QAP: Which of the following is/are true regarding a 0.1 M solution of Ba(OH)2? (a) [ OH ]=0.1M(b) [ OH... Problem 97QAP: Which of the following is/are true about a 0.10 M solution of a strong acid, HY? (a) [ Y ]=0.10M(b)... Problem 98QAP: Consider the following six beakers. All have 100 mL of aqueous 0.1 M solutions of the following... Problem 99QAP: Each box represents an acid solution at equilibrium. Squares represent H+ ions. Circles represent... Problem 100QAP: Each box represents an acid solution at equilibrium. Squares represent H+ ions, and circles... Problem 101QAP Problem 102QAP: You are asked to determine whether an unknown white solid is acidic or basic. You also need to say... Problem 103QAP: What is the pH of a 0.020 M solution of H2SO4? You may assume that the first ionization is complete.... Problem 104QAP Problem 105QAP: What is the pH of a solution obtained by mixing 0.30 L of 0.233 M Ba(OH)2 and 0.45 L of 0.12 M HCl?... Problem 106QAP: A solution is made up of 273 mL of 0.164 M HNO3 and 0.800 M HCl. The resulting pH of the solution is... Problem 107QAP: What is the freezing point of vinegar, which is an aqueous solution of 5.00% acetic acid, HC2H3O2,... Problem 108QAP Problem 109QAP: Consider two weak acids, HA (MM=138g/mol)and HB (MM=72.0g/mol). A solution consisting of 11.0 g of... Problem 110QAP: Consider an aqueous solution of a weak base, NaB (MM=233g/mol). It has a pH of 10.54. The freezing... format_list_bulleted
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