Which acid-base pair will always undergo a reaction that produces a neutral solution? answer?

Strong acid on combining with strong base will always give neutral solutions. Consider the following example for the same

HCl + NaOH ↔ NaCl + H2O

(strong (strong

acid) base)

In above case, the resultant solution is neutral in nature.

On other hand, weak acid will react with strong base to form salt and water. But the solution will be basic in nature. Also, strong acid will react with weak base to form salt and water. But the solution will be acidic in nature