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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

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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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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