What would be a necessary condition for comparing the strengths of two bases based on their Ka values?

To compare the strengths of two bases using their Ka values, it is essential that they are at the same concentration. The acid dissociation constant (Ka) reflects the ability of an acid to donate protons in solution, which indirectly influences the strength of the corresponding base. If the concentrations of the bases differ when comparing their Ka values, any observed differences in the extent of ionization might be misleading. This is because a higher concentration could lead to a higher degree of dissociation in one case that does not accurately reflect the base's intrinsic strength as compared to the other. By ensuring that both bases are at the same concentration, you establish a uniform condition for comparison, allowing for a more accurate assessment of their relative strengths as bases based on their dissociation constants.