Select all of the following that would be acceptable
Select all of the following that would be acceptable conjugate acid-base pairs to use in the preparation of a pH=9.8 buffer.
HCN/KCN
KHSO3/K2SO3
KHCO3/K2CO3
H2S/KHS
KHS/K2S
NH4Cl/NH3
HNO2/KNO2
HF/KF
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