plain which combination is the best choice to prep a buffer

Last updated: 7/2/2023

plain which combination is the best choice to prep a buffer with a pH of 9 0 a NH3 NH4Cl pKb for NH3 4 75 b C5H5N C5H5NHCI pKb for C5H5N 8 76 c HNO2 NaNO2 pKa for HNO2 3 33 d HCHO2 NaCHO2 pKa for HCHO2 3 74