Multiple Choice
Assuming equal concentrations of conjugate base and acid, which of the following mixtures is suitable for making a buffer solution with an optimum pH in the range of 9.1-9.5?
A) CH3NH2/CH3NH3Cl (Ka = 2.3 × 10-11)
B) NaNO3/HNO3
C) NaOCN/HOCN (Ka = 2.0 × 10-4)
D) NaNO2/HNO2 (Ka = 4.6 × 10-4)
E) KCN/HCN (Ka = 4.9 × 10-10)
Correct Answer:
Verified
Correct Answer:
Verified
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