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8. What is the pH of a weak acid with [HA] = 0.125 mol/L and Ka = 5.4×107? 9. A buffer is created by adding 0.35 mol of sodium benzoate to 1.00 L of a 0.40 mol/L benzoic acid solution. The Ka of benzoic acid is 6.3×105. Determine the pH of the buffer. 10. 15.0 mL of 0.250 mol/L iron (II) chloride is mixed with 5.00 mL of 0.0030 mol/L sodium hydroxide. Does a precipitate form? (Ksp=4.87×10-17)! 11. For the following reaction, identify the species that is undergoing oxidation and the species that is undergoing reduction: I 12. Balance the following reaction in a basic solution: ´´ Zn + NO3 → Zn(OH)2 + NH3

8. What is the pH of a weak acid with [HA] = 0.125 mol/L and Ka = 5.4×107? 9. A buffer is created by adding 0.35 mol of sodium benzoate to 1.00 L of a 0.40 mol/L benzoic acid solution. The Ka of benzoic acid is 6.3×105. Determine the pH of the buffer. 10. 15.0 mL of 0.250 mol/L iron (II) chloride is mixed with 5.00 mL of 0.0030 mol/L sodium hydroxide. Does a precipitate form? (Ksp=4.87×10-17)! 11. For the following reaction, identify the species that is undergoing oxidation and the species that is undergoing reduction: I 12. Balance the following reaction in a basic solution: ´´ Zn + NO3 → Zn(OH)2 + NH3

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter16: Acid-base Equilibria
Section: Chapter Questions
Problem 16.141QP: Ka for formic acid is 1.7 104 at 25C. A buffer is made by mixing 529 mL of 0.465 M formic acid,...
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8. What is the pH of a weak acid with [HA] = 0.125 mol/L and Ka = 5.4×107? 9. A buffer is created by adding 0.35 mol of sodium benzoate to 1.00 L of a 0.40 mol/L benzoic acid solution. The Ka of benzoic acid is 6.3×105. Determine the pH of the buffer.
Transcribed Image Text:8. What is the pH of a weak acid with [HA] = 0.125 mol/L and Ka = 5.4×107? 9. A buffer is created by adding 0.35 mol of sodium benzoate to 1.00 L of a 0.40 mol/L benzoic acid solution. The Ka of benzoic acid is 6.3×105. Determine the pH of the buffer.
10. 15.0 mL of 0.250 mol/L iron (II) chloride is mixed with 5.00 mL of 0.0030 mol/L sodium hydroxide. Does a precipitate form? (Ksp=4.87×10-17)! 11. For the following reaction, identify the species that is undergoing oxidation and the species that is undergoing reduction: I 12. Balance the following reaction in a basic solution: ´´ Zn + NO3 → Zn(OH)2 + NH3
Transcribed Image Text:10. 15.0 mL of 0.250 mol/L iron (II) chloride is mixed with 5.00 mL of 0.0030 mol/L sodium hydroxide. Does a precipitate form? (Ksp=4.87×10-17)! 11. For the following reaction, identify the species that is undergoing oxidation and the species that is undergoing reduction: I 12. Balance the following reaction in a basic solution: ´´ Zn + NO3 → Zn(OH)2 + NH3
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