# Which of the following couples are buffer systems? How do you determine this?

## (a) KF/HF (b) KBr/HBr (c) Na2CO3 /NaHCO

A buffer solution is a mixture of a weak acid and its conjugate base that acts to moderate gross changes in $p H$. Hydrogen bromide is not a weak acid, and would give stoichiometric ${H}_{3} {O}^{+}$ in aqueous solution.