Choose only the mixtures that constitute buffer solutions. Can someone how i would determine this as well?
0.30 M HOCN mixed with 0.35 M NaNO3
0.30 M HNO3 mixed with 0.35 M NaNO3
0.20 M CH3NH2 mixed with 0.30 M KBr
0.20 M NaOH mixed with 0.30 M NaBr
0.20 M (CH3)2NH (a weak base) mixed with 0.30 M (CH3)2NH2Cl
0.30 M HF mixed with 0.35 M NaF