Answer
Because the conjugate pairs of strong acids and bases are pH-neutral, they don't have a significant acidity/basicity.
$KNO_3$:
$K^+$: Insignificant acid (Conjugate acid of $KOH$)
$N{O_3}^-$: Insignificant base (Conjugate base of $HN{O_3}$)
Work Step by Step
- The stronger the acid/base, the weaker its conjugate pair; therefore, conjugate pairs of strong acids/bases will have insignificant basicity/acidity.