Multiple Choice
Which of the following combinations would be best to buffer an aqueous solution at a pH of 9.24?
A) H3PO4 and H2PO4-,Ka1 = 7.5 × 10-3
B) HNO2 and NO2-,Ka = 4.5 × 10-4
C) CH3CO2H and CH3COO-,Ka = 1.8 × 10-5
D) H2PO4- and HPO42-,Ka2 = 6.2 × 10-8
E) NH4+ and NH3,Ka = 5.7 × 10-10
Correct Answer:
Verified
Correct Answer:
Verified
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