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Problem Set 15 CHEM 1252 November 10, 2019 Textbook Reading...
Problem Set 15 CHEM 1252 November 10, 2019 Textbook Reading Assignment: 15.5-8 [and see App. 5...
Problem Set 15 CHEM 1252 November 10, 2019 Textbook Reading Assignment: 15.5-8 [and see App. 5 for Kor k, values] Additional Practice Problems: 15.51,57,59,61,63,65-66,69-71,77-78,80,84 1. Calculate the concentration of an aqueous HNO solution that has a pH of 2.45. 2. The på, of hypochlorous acid (HOCI) is 7.53. (a) Calculate the K. of HOCI. Given that the pk, of hypobromous acid (HOBr) is 8.63, which acid is stronger, and how do you know? (b) Write the reaction (with physical states)...
Help please and show all work! CHEM 1252 November 13, 2019 Problem Set 16 Textbook Reading...
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CHEM 1252 November 13, 2019 Problem Set 16 Textbook Reading Assignment: 16.1-4 Additional Practice Problems: 15.95,101-106,109, 16.1,5,15,17,19,21,23,25,31,35,43-45,47 1. Hypochlorous acid (HOCI) is a weak acid (n = 7.53). Sodium hypochlorite is the sodium salt of its conjugate base and is the main ingredient in "household bleach. (a) Write balanced chemical equations, with physical states, for acid dissociation of HOCI and base hydrolysis of hypochlorite (OC). (b) Calculate the pH of a 0.125 M solution...
Help please and show all work! Problem Set 14 CHEM 1252 November 4, 2019 Textbook Reading Assignment: 15.1-4 Additio...
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Problem Set 14 CHEM 1252 November 4, 2019 Textbook Reading Assignment: 15.1-4 Additional Practice Problems: 15.11-15,17,19,21,24,28-31,35,37,41,43,45,47 1. Acetic acid (H3C202H) has k, = 1.8 x 10-5 and acetate (H2CO3--) has ks = 5.6 x 10- (a) Write balanced chemical equilibrium equations (with physical states) for acid dissociation of acetic acid and base hydrolysis of acetate ion. (b) Write K, and Ko equilibrium constant expressions for the above reactions. (c) Use your expressions from part...
Help please and show all work! Problem Set 17 CHEM 1252 November 18, 2019 Textbook Reading...
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Problem Set 17 CHEM 1252 November 18, 2019 Textbook Reading Assignment 16.5-8 Additional Practice Problems: 16.51,55-58,63,73,75,79,81-82,89,91,93,95,97-98,105,123,127 1. A buffer called "This is widely used in biochemistry. The neutral) compound Tris itself is a weak base, So we'll notate it as "B." The pk, of its conjugate acid (HB) is 8.07. The overall goal of this problem is to calculate the pH change of a Tris buffer upon addition of some strong base. (a) Assume...
Help please! Show work Problem Set 13 CHEM 1252 October 21, 2019 Textbook Reading Assignment: 14.6-10...
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Problem Set 13 CHEM 1252 October 21, 2019 Textbook Reading Assignment: 14.6-10 uce Problems: 14.63,66-68,70,73,75,77,79,83,86-87,89,101,107,111-115,119 1. Ammonia and hydrogen sulfide can both be formed directly from their elements. At 90 °C... N2(g) + 3H2(g) + 2NH3(g) K = 120 H2(g) + S(s) = H2S(8) K = 0.068 Find K at 90 °C for the following reaction: 2NH3(g) + 3S() = 3H2S(8) + N2(g) K = ? entrations ctants and ture at ing values and -14 ee-energy...
Help Please! Show all work Problem Set 12 October 16, 2019 CHEM 1252 Textbook Reading Assignment:...
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Problem Set 12 October 16, 2019 CHEM 1252 Textbook Reading Assignment: 14.1-5 Additional Practice Problems: 14.1,7,13,17,19,23,25,29,31,41-42,47,53,55,58,61 1. What does it mean when we say that chemical equilibrium is a dynamic process? 2. Write an expression for Kor K, (whichever is more appropriate) for each of the following reactions, and give typical units (if any) for the equilibrium constant. (a)Na(e) + O2(g) - 2 NO(g) (b) 2012(g) + 2H2008) - 4HCI(g) + O2(g) (c) 1(aq) +...
Help please and show all work! Problem Set 15 CHEM 1252 November 10, 2019 4. A...
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Problem Set 15 CHEM 1252 November 10, 2019 4. A 0.100 M solution of bromoacetic acid (BrCH2CO2H) is 13.2% ionized (dissociated). (a) Calculate [H3O+] (or "[H*]"), [BrCH2CO2-] (or "[A-]"), and [BrCH2CO2H] (or "[HA]"). (b) Calculate K, and pk, for bromoacetic acid.
Help Please! Show all work October 11, 2019 CHEM 1252 Problem Set 11 Textbook Reading Assignment:...
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October 11, 2019 CHEM 1252 Problem Set 11 Textbook Reading Assignment: 12.5-8 Additional Practice Problems: 12.43-44,46-48,50-55,57,59-61,63,65,67,73,75,81 1. A certain reaction has a All=-10.5 kJ and a AS +50.5 3/K (a) Explain whether or not the reaction is endothermic or exothermic. (b) Explain if the reaction is leading to an increase, decrease, or no change in disorder of the system. (c) Is the reaction spontaneous at 0 °C? 2. Use data from Appendix 4 (Table A4.3)...
Problem Set 14 CHEM 1252 November 4, 2019 Textbook Reading Assignment: 15.1-4 Additional Practice Problems: 15.11-...
Problem Set 14 CHEM 1252 November 4, 2019 Textbook Reading Assignment: 15.1-4 Additional Practice Problems: 15.11-15,17,19,21,24,28-31,35,37,41,43,45,47 1. Acetic acid (HCO,H) has k, = 1.8 x 10- and acetate (HCO3") has ke -5.6 x 10-10 (a) Write balanced chemical equilibrium equations (with physical states) for acid dissociation of acetic acid and base hydrolysis of acetate lon. (b) Write K, and K, equilibrium constant expressions for the above reactions. (c) Use your expressions from part b to show that KK - 1.0...
Help please and show all work! Problem Set 14 CHEM 1252 November 4, 2019 4. At...
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Problem Set 14 CHEM 1252 November 4, 2019 4. At 25 °C, K= 1.0 x 10-14, while at 0 °C, K= 1.2 x 10-15 (a) Explain whether water becomes a stronger or weaker acid as temperature decreases. (b) Write the equilibrium constant expression for the ionization of water to hydronium ion and hydroxide and calculate the concentrations of [H3O*] and [OH in pure water at 0 °C. (c) An aqueous solution at 25 °C...
Problem Set 15 CHEM 1252 November 10, 2019 Textbook Reading Assignment: 15.5-8 [and see App. 5 for Kor k, values] Additional Practice Problems: 15.51,57,59,61,63,65-66,69-71,77-78,80,84 1. Calculate the concentration of an aqueous HNO solution that has a pH of 2.45. 2. The på, of hypochlorous acid (HOCI) is 7.53. (a) Calculate the K. of HOCI. Given that the pk, of hypobromous acid (HOBr) is 8.63, which acid is stronger, and how do you know? (b) Write the reaction (with physical states)...
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CHEM 1252 November 13, 2019 Problem Set 16 Textbook Reading Assignment: 16.1-4 Additional Practice Problems: 15.95,101-106,109, 16.1,5,15,17,19,21,23,25,31,35,43-45,47 1. Hypochlorous acid (HOCI) is a weak acid (n = 7.53). Sodium hypochlorite is the sodium salt of its conjugate base and is the main ingredient in "household bleach. (a) Write balanced chemical equations, with physical states, for acid dissociation of HOCI and base hydrolysis of hypochlorite (OC). (b) Calculate the pH of a 0.125 M solution...
Help please and show all work!
Problem Set 14 CHEM 1252 November 4, 2019 Textbook Reading Assignment: 15.1-4 Additional Practice Problems: 15.11-15,17,19,21,24,28-31,35,37,41,43,45,47 1. Acetic acid (H3C202H) has k, = 1.8 x 10-5 and acetate (H2CO3--) has ks = 5.6 x 10- (a) Write balanced chemical equilibrium equations (with physical states) for acid dissociation of acetic acid and base hydrolysis of acetate ion. (b) Write K, and Ko equilibrium constant expressions for the above reactions. (c) Use your expressions from part...
Help please and show all work!
Problem Set 17 CHEM 1252 November 18, 2019 Textbook Reading Assignment 16.5-8 Additional Practice Problems: 16.51,55-58,63,73,75,79,81-82,89,91,93,95,97-98,105,123,127 1. A buffer called "This is widely used in biochemistry. The neutral) compound Tris itself is a weak base, So we'll notate it as "B." The pk, of its conjugate acid (HB) is 8.07. The overall goal of this problem is to calculate the pH change of a Tris buffer upon addition of some strong base. (a) Assume...
Help please! Show work
Problem Set 13 CHEM 1252 October 21, 2019 Textbook Reading Assignment: 14.6-10 uce Problems: 14.63,66-68,70,73,75,77,79,83,86-87,89,101,107,111-115,119 1. Ammonia and hydrogen sulfide can both be formed directly from their elements. At 90 °C... N2(g) + 3H2(g) + 2NH3(g) K = 120 H2(g) + S(s) = H2S(8) K = 0.068 Find K at 90 °C for the following reaction: 2NH3(g) + 3S() = 3H2S(8) + N2(g) K = ? entrations ctants and ture at ing values and -14 ee-energy...
Help Please! Show all work
Problem Set 12 October 16, 2019 CHEM 1252 Textbook Reading Assignment: 14.1-5 Additional Practice Problems: 14.1,7,13,17,19,23,25,29,31,41-42,47,53,55,58,61 1. What does it mean when we say that chemical equilibrium is a dynamic process? 2. Write an expression for Kor K, (whichever is more appropriate) for each of the following reactions, and give typical units (if any) for the equilibrium constant. (a)Na(e) + O2(g) - 2 NO(g) (b) 2012(g) + 2H2008) - 4HCI(g) + O2(g) (c) 1(aq) +...
Help please and show all work!
Problem Set 15 CHEM 1252 November 10, 2019 4. A 0.100 M solution of bromoacetic acid (BrCH2CO2H) is 13.2% ionized (dissociated). (a) Calculate [H3O+] (or "[H*]"), [BrCH2CO2-] (or "[A-]"), and [BrCH2CO2H] (or "[HA]"). (b) Calculate K, and pk, for bromoacetic acid.
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October 11, 2019 CHEM 1252 Problem Set 11 Textbook Reading Assignment: 12.5-8 Additional Practice Problems: 12.43-44,46-48,50-55,57,59-61,63,65,67,73,75,81 1. A certain reaction has a All=-10.5 kJ and a AS +50.5 3/K (a) Explain whether or not the reaction is endothermic or exothermic. (b) Explain if the reaction is leading to an increase, decrease, or no change in disorder of the system. (c) Is the reaction spontaneous at 0 °C? 2. Use data from Appendix 4 (Table A4.3)...
Problem Set 14 CHEM 1252 November 4, 2019 Textbook Reading Assignment: 15.1-4 Additional Practice Problems: 15.11-15,17,19,21,24,28-31,35,37,41,43,45,47 1. Acetic acid (HCO,H) has k, = 1.8 x 10- and acetate (HCO3") has ke -5.6 x 10-10 (a) Write balanced chemical equilibrium equations (with physical states) for acid dissociation of acetic acid and base hydrolysis of acetate lon. (b) Write K, and K, equilibrium constant expressions for the above reactions. (c) Use your expressions from part b to show that KK - 1.0...
Help please and show all work!
Problem Set 14 CHEM 1252 November 4, 2019 4. At 25 °C, K= 1.0 x 10-14, while at 0 °C, K= 1.2 x 10-15 (a) Explain whether water becomes a stronger or weaker acid as temperature decreases. (b) Write the equilibrium constant expression for the ionization of water to hydronium ion and hydroxide and calculate the concentrations of [H3O*] and [OH in pure water at 0 °C. (c) An aqueous solution at 25 °C...
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