Determine whether the compounds below could be used to prepare an buffer solution. Items (6 items) (Drag and drop into the appropriate area below) acetic acid Ka-1.8x10-5 ammonia Kb= 1.8x10 carbonic acid Ka-4.3x107 chlorous acid: calcium Ka-1.1x10-2 sulfuric acid hydroxide Categories CANNOT be used Drag and drop here Drag and drop here

Acetic acid, carbonic acid and chlorous acid with calcium hydroxide

Ammonia with sulfuric acid

Explanation:

A buffer is an aqueous mixture of a weak acid and its conjugate base or vice versa.

Weak acids reacts with strong bases to produce the conjugate base. In the right amount, you can produce a buffer. In the same way, you can produce a buffer from the mixture of weak bases with strong acids.

In the problem, you have weak acids (acetic acid, carbonic acid, chlorous acid), one weak base (ammonia), one strong base (calcium hydroxide) and one strong acid (Sulfuric acid).

Thus, the mixtures that can produce a buffer are:

Acetic acid, carbonic acid and chlorous acid with calcium hydroxide

And:

Ammonia with sulfuric acid