Here's why:

* Strong acid: Completely dissociates in water, releasing H+ ions.

* Strong base: Completely dissociates in water, releasing OH- ions.

When a strong acid and a strong base react, the H+ ions from the acid react with the OH- ions from the base to form water (H2O). The remaining ions, which are the cation from the base and the anion from the acid, combine to form a salt.

Example:

* Hydrochloric acid (HCl) + Sodium hydroxide (NaOH) → Sodium chloride (NaCl) + Water (H2O)

In this example:

* HCl is the strong acid, releasing H+ and Cl-.

* NaOH is the strong base, releasing Na+ and OH-.

* H+ and OH- combine to form water.

* Na+ and Cl- combine to form sodium chloride, a salt.

Key points:

* The reaction is a neutralization reaction, as the acid and base neutralize each other.

* The resulting salt is usually neutral (not acidic or basic), but some salts can have slightly acidic or basic properties depending on the acid and base used.

* The pH at the equivalence point (where the acid and base have completely neutralized each other) is close to 7 for strong acid-strong base titrations.