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please show the calculations for question 19 and 21 if
possible. thanks.
Question #19 An aqueous...
the right answers are circled, if there are two circled answers the blue is the right...
the right answers are circled, if there are two circled
answers the blue is the right one. please show all the calculations
on how to solve each questions, thanks.
4) None of the above Question #15 CH,COOH + OH - CH,C00- + H2O For acetic acid (CH,COOH), pk, -4.756 at 25°C. Based on this information, it can be concluded that the above reaction is characterized by this equilibrium constant at 25°C: (1) 5.702 x 10"; (2) 1.754 x 10': (3)...
please answer both questions QUESTION 18 An aqueous solution contains 0.27 M ammonium chloride, NH4Cl. One liter of...
please answer both questions
QUESTION 18 An aqueous solution contains 0.27 M ammonium chloride, NH4Cl. One liter of this solution could be converted into a buffer by the addition of 1.0.27 mol NH4Br 6.0.27 mol HBC 6.0.13 mol HCI 1.0.26 mol NH3 9.0.26 mol KCI QUESTION 19 A 29.9 ml. sample of 0.299 M methylamine, CH3NH2, is titrated with 0.331 M hydroiodic acid, HI at 25°C. (Xb for methylamine is 4.2 * 10-4) What is the pH at the equivalence...
please show steps 16.36 Calculate the pH of an aqueous solution at 25°C that is (a)...
please show steps
16.36 Calculate the pH of an aqueous solution at 25°C that is (a) 0.12 M in HCI, (b) 2.4 M in HNO3, and (c) 3.2 X 10 M in HCIO4 16.54 Calculate the pH of an aqueous solution at 25°C that is 0.34 M in phenol (CH5OH). (K, for phenol - 1.3 x 1010 The pH of an aqueous acid solution is 6.20 at 25°C. Calculate the K, for the acid. The initial acid 16.60 concentration is...
please answer them all :) (19) In question (12) a catalyst would shift the equilibrium to...
please answer them all :)
(19) In question (12) a catalyst would shift the equilibrium to the (a) left (b) right (C) no shift (d) middle. (20) What will be Kc for SO3 (g) = SO2 (g) + 1/2O2(g). (a) 4.74 (b)0.25 (c) 4.0 (d) 17.0 (e) 0.211 (21) Consider the data below: (14) Consider the reaction: 2N2(g) + O2(g) = 2N20(g) At a certain temperature a 2.00 L flask at equilibrium contains 2.80 X 104 mol of N2 (g),...
Hydrofluoric Acid has a dissociation constant at 25°C of 6.7 x10-4. If 1.0 mol of HF...
Hydrofluoric Acid has a dissociation constant at 25°C of 6.7 x10-4. If 1.0 mol of HF is dissolved in enough water to give 1.00 L of solution, what is the hydrogen ion concentration in this solution expressed in M? a) 2.0 x 10-2 b) 2.6 x 10-2 c) 3.3 x 103 d) 6.7 x 10-4 e) none of the above Оа Od Ob Ос
please help if possible Question 21 (5 points) Which of the following is true for the...
please help if possible
Question 21 (5 points) Which of the following is true for the conjugate base of a strong acid? The conjugate base of a strong acid acts as a weak acid. As the strength of the acid increases, the strength of the conjugate base decreases. The conjugate base of a strong acid is a strong base. As the strength of the acid increases, the strength of the conjugate base also increases. Question 22 (5 points) The Ksp...
Some scientists believe that coronavirus (Covid-19) can not tolerate high temperatures. They say that keeping the...
Some scientists believe that coronavirus (Covid-19) can not tolerate high temperatures. They say that keeping the food in hot water (above 70 °C) for at least 5 minutes will make the food safer compared to the uncooked food. a) Calculate the heat, in kilojoules, needed to prepare 10 L of hot liquid water at 80 °C if the initial temperature of water is 30 °C? b) A minimum of how many grams of isooctane (C3H18) must be burned to provide...
please show full work for understanding purposes:) 5. (4 pts) Calculate the pH of a 0.0025 M aqueous solution of s...
please show full work for understanding purposes:)
5. (4 pts) Calculate the pH of a 0.0025 M aqueous solution of strontium hydroxide, Sr(OH). Sr(OH)2 = Srz + 20H .0025 - x + x + 2x o rood .0025 - Kb = (2x² 4 = 6.5*103 0.0025 ) pH = 6. (6 pts) Calculate the pH of a 0.175 M NH; aqueous solution. K. for NH, is 1.8 x 10. pH = 180 7. (10 pts) Determine the pH of a...
Need help with the following THREE questions (19,20, and 21) 19. Use the standard reaction enthalpies given below to...
Need help with the following THREE questions (19,20, and
21)
19. Use the standard reaction enthalpies given below to determine A rxn for the following reaction: 2 S(s) + 302(g) - 2 503() AH rxn = ? Given: 06-298) SO2(e) - S(s) + O2(8) AHørxn = +296.8 kJ -1978 2 SO2(8) + 02() + 2 503(E) AHørxn = -197.8 kl - 791.4 A. -494.6 kJ B. -692.4 kJ C.-791.4 kJ D. +1583 kl E. -293.0 kJ 20. Use the information...
Which of the following statements is true of weak acids dissolved in water: They...
Which of the following statements is true of weak acids dissolved in water: They are completely ionized in water They are totally unionized in water They are partially ionized in water The dissociation constant is a function of pH QUESTION 13 Which of the following is a hydroxide ion? H3O+ OH- HOOH CH3OH2+ QUESTION 14 The following molecule is an example of which class...
the right answers are circled, if there are two circled
answers the blue is the right one. please show all the calculations
on how to solve each questions, thanks.
4) None of the above Question #15 CH,COOH + OH - CH,C00- + H2O For acetic acid (CH,COOH), pk, -4.756 at 25°C. Based on this information, it can be concluded that the above reaction is characterized by this equilibrium constant at 25°C: (1) 5.702 x 10"; (2) 1.754 x 10': (3)...
please answer both questions
QUESTION 18 An aqueous solution contains 0.27 M ammonium chloride, NH4Cl. One liter of this solution could be converted into a buffer by the addition of 1.0.27 mol NH4Br 6.0.27 mol HBC 6.0.13 mol HCI 1.0.26 mol NH3 9.0.26 mol KCI QUESTION 19 A 29.9 ml. sample of 0.299 M methylamine, CH3NH2, is titrated with 0.331 M hydroiodic acid, HI at 25°C. (Xb for methylamine is 4.2 * 10-4) What is the pH at the equivalence...
please show steps
16.36 Calculate the pH of an aqueous solution at 25°C that is (a) 0.12 M in HCI, (b) 2.4 M in HNO3, and (c) 3.2 X 10 M in HCIO4 16.54 Calculate the pH of an aqueous solution at 25°C that is 0.34 M in phenol (CH5OH). (K, for phenol - 1.3 x 1010 The pH of an aqueous acid solution is 6.20 at 25°C. Calculate the K, for the acid. The initial acid 16.60 concentration is...
please answer them all :)
(19) In question (12) a catalyst would shift the equilibrium to the (a) left (b) right (C) no shift (d) middle. (20) What will be Kc for SO3 (g) = SO2 (g) + 1/2O2(g). (a) 4.74 (b)0.25 (c) 4.0 (d) 17.0 (e) 0.211 (21) Consider the data below: (14) Consider the reaction: 2N2(g) + O2(g) = 2N20(g) At a certain temperature a 2.00 L flask at equilibrium contains 2.80 X 104 mol of N2 (g),...
Hydrofluoric Acid has a dissociation constant at 25°C of 6.7 x10-4. If 1.0 mol of HF is dissolved in enough water to give 1.00 L of solution, what is the hydrogen ion concentration in this solution expressed in M? a) 2.0 x 10-2 b) 2.6 x 10-2 c) 3.3 x 103 d) 6.7 x 10-4 e) none of the above Оа Od Ob Ос
please help if possible
Question 21 (5 points) Which of the following is true for the conjugate base of a strong acid? The conjugate base of a strong acid acts as a weak acid. As the strength of the acid increases, the strength of the conjugate base decreases. The conjugate base of a strong acid is a strong base. As the strength of the acid increases, the strength of the conjugate base also increases. Question 22 (5 points) The Ksp...
Some scientists believe that coronavirus (Covid-19) can not tolerate high temperatures. They say that keeping the food in hot water (above 70 °C) for at least 5 minutes will make the food safer compared to the uncooked food. a) Calculate the heat, in kilojoules, needed to prepare 10 L of hot liquid water at 80 °C if the initial temperature of water is 30 °C? b) A minimum of how many grams of isooctane (C3H18) must be burned to provide...
please show full work for understanding purposes:)
5. (4 pts) Calculate the pH of a 0.0025 M aqueous solution of strontium hydroxide, Sr(OH). Sr(OH)2 = Srz + 20H .0025 - x + x + 2x o rood .0025 - Kb = (2x² 4 = 6.5*103 0.0025 ) pH = 6. (6 pts) Calculate the pH of a 0.175 M NH; aqueous solution. K. for NH, is 1.8 x 10. pH = 180 7. (10 pts) Determine the pH of a...
Need help with the following THREE questions (19,20, and
21)
19. Use the standard reaction enthalpies given below to determine A rxn for the following reaction: 2 S(s) + 302(g) - 2 503() AH rxn = ? Given: 06-298) SO2(e) - S(s) + O2(8) AHørxn = +296.8 kJ -1978 2 SO2(8) + 02() + 2 503(E) AHørxn = -197.8 kl - 791.4 A. -494.6 kJ B. -692.4 kJ C.-791.4 kJ D. +1583 kl E. -293.0 kJ 20. Use the information...
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