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
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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
(0)
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?
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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F04b28093-4f77-4d69-adb9-9e4a8e9f1bf0%2Faf77a507-c2c9-465e-ab56-66e7de13843e%2F0airto_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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
(0)
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?
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
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