Define and construct a buffer of ph 9

Reference no: EM13240694

Given the values of Ka and Kb below, which of the systems given would be most suitable to use to construct a buffer of pH 9?

HCOOH, Ka = 1.8 x 10-4

CH3COOH, Ka = 1.8 x 10-5

H3AsO4, Ka1 = 6.0 x 10-3, Ka2 = 1.1 x 10-7, Ka3 = 3 x 10-12

C5H5N, Kb = 1.7 x 10-9

NH3, Kb = 1.8 x 10-5

A. H3AsO4/NaH2AsO4
B. HCOOH/NaHCOO
C. C5H5N/ C5H5NHCl
D. CH3COOH/KCH3COO
E. NH4Cl/NH3

Reference no: EM13240694

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