Which one has the greater buffer capacity?

Question

Which one has the greater buffer capacity? why?
(a) 50mL of 0.20M NH4Br-0.30M NaNO2 or
(b) 50mL of 0.40M NH4Br-0.60M NH3

Answer 1

50mL of 0.40M NH4Br-0.60M NH3

The base is present.

Answer 2

Buffer combos guard their buffer action on condition that restricted quantities of an acid or an alkali are further. In different words,each buffer mixture has nicely-defined buffer potential. This potential is optimal even as the answer contains equivalents quantities of the weak acid and its salt or weak base and its salt , it truly is,even as the ratio of salt to acid or salt to base is team spirit. that's been stated that the better the concentrations of the factors of buffer mixture, the more beneficial is its buffer potential. subsequently d has more beneficial buffer potential.