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8) Which of the following solutions is a good buffer system? A) A solution that is 0.10 M NaOH and 0.10 M HNO3 B) A solution that is 0.10 M HNO3 and 0.10 M KNO3 C) A solution that is 0.10 M NaCl and 0.10 M HCI D) A solution that is 0.10 M HCN and 0.10 M NaCl E) A solution that is 0.10 M HCN and 0.10 M LICN 9) If the pKa of HCHO2 is 3.74 and the pH of an HCHO₂/NaCHO₂ solution is 3.89, which of the following is TRUE? (0) A) [HCHO₂] = [NaCHO₂] B) [HCHO₂] < [NaCHO₂] C) [HCHO₂] > [NaCHO₂] D) [HCHO₂] >> [NaCHO₂] E) It is not possible to make a buffer of this pH from HCHO2 and NaCHO2. Which of the following acids (listed with pKa values) and their conjugate base would form a buffer with a pH of 8.10? A) HCIO, pKa = 7.54 B) HF, pK₂ = 3.46 C) HClO2, pKa = 1.96 D) HC7H502, pKa = 4.19 E) HCN, pKa = 9.31

8) Which of the following solutions is a good buffer system? A) A solution that is 0.10 M NaOH and 0.10 M HNO3 B) A solution that is 0.10 M HNO3 and 0.10 M KNO3 C) A solution that is 0.10 M NaCl and 0.10 M HCI D) A solution that is 0.10 M HCN and 0.10 M NaCl E) A solution that is 0.10 M HCN and 0.10 M LICN 9) If the pKa of HCHO2 is 3.74 and the pH of an HCHO₂/NaCHO₂ solution is 3.89, which of the following is TRUE? (0) A) [HCHO₂] = [NaCHO₂] B) [HCHO₂] < [NaCHO₂] C) [HCHO₂] > [NaCHO₂] D) [HCHO₂] >> [NaCHO₂] E) It is not possible to make a buffer of this pH from HCHO2 and NaCHO2. Which of the following acids (listed with pKa values) and their conjugate base would form a buffer with a pH of 8.10? A) HCIO, pKa = 7.54 B) HF, pK₂ = 3.46 C) HClO2, pKa = 1.96 D) HC7H502, pKa = 4.19 E) HCN, pKa = 9.31

Chemistry
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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**Buffer System and pH Problem Set** **Question 8: Buffer System Identification** Which of the following solutions is a good buffer system? - A) A solution that is 0.10 M NaOH and 0.10 M HNO₃ - B) A solution that is 0.10 M HNO₃ and 0.10 M KNO₃ - C) A solution that is 0.10 M NaCl and 0.10 M HCl - D) A solution that is 0.10 M HCN and 0.10 M NaCl - E) A solution that is 0.10 M HCN and 0.10 M LiCN **Question 9: Buffer pH Relationship** If the pKa of HCHO₂ is 3.74 and the pH of an HCHO₂/NaCHO₂ solution is 3.89, which of the following is TRUE? - A) [HCHO₂] = [NaCHO₂] - B) [HCHO₂] < [NaCHO₂] - C) [HCHO₂] > [NaCHO₂] - D) [HCHO₂] >> [NaCHO₂] - E) It is not possible to make a buffer of this pH from HCHO₂ and NaCHO₂. **Question 10: Buffer Formation with Acids** Which of the following acids (listed with pKa values) and their conjugate base would form a buffer with a pH of 8.10? - A) HClO, pKa = 7.54 - B) HF, pKa = 3.46 - C) HClO₂, pKa = 1.96 - D) HC₇H₅O₂, pKa = 4.19 - E) HCN, pKa = 9.31
Transcribed Image Text:**Buffer System and pH Problem Set** **Question 8: Buffer System Identification** Which of the following solutions is a good buffer system? - A) A solution that is 0.10 M NaOH and 0.10 M HNO₃ - B) A solution that is 0.10 M HNO₃ and 0.10 M KNO₃ - C) A solution that is 0.10 M NaCl and 0.10 M HCl - D) A solution that is 0.10 M HCN and 0.10 M NaCl - E) A solution that is 0.10 M HCN and 0.10 M LiCN **Question 9: Buffer pH Relationship** If the pKa of HCHO₂ is 3.74 and the pH of an HCHO₂/NaCHO₂ solution is 3.89, which of the following is TRUE? - A) [HCHO₂] = [NaCHO₂] - B) [HCHO₂] < [NaCHO₂] - C) [HCHO₂] > [NaCHO₂] - D) [HCHO₂] >> [NaCHO₂] - E) It is not possible to make a buffer of this pH from HCHO₂ and NaCHO₂. **Question 10: Buffer Formation with Acids** Which of the following acids (listed with pKa values) and their conjugate base would form a buffer with a pH of 8.10? - A) HClO, pKa = 7.54 - B) HF, pKa = 3.46 - C) HClO₂, pKa = 1.96 - D) HC₇H₅O₂, pKa = 4.19 - E) HCN, pKa = 9.31
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