Which combination of solutions is the best choice for making a buffer solution?

Question

Quizplus · Accepted Answer

Buffer solutions require a weak acid and its conjugate base, or a weak base and its conjugate acid, in roughly equal concentrations. D provides a weak base, ammonia, and its conjugate acid, ammonium chloride, in equal volumes and at suitable concentrations. Option A provides ammonia and ammonium chloride, which are a weak base and its conjugate acid, but they are at different concentrations. Option B provides strong acid and strong base, which do not form a buffer solution. Option C provides a strong acid and a salt, which does not contain a weak acid or base needed for a buffer. Option E provides ammonium chloride and hydrochloric acid, which are a weak acid and conjugate base, but again, they are at different concentrations.

Which Combination of Solutions Is the Best Choice for Making