* KF is a salt formed from a strong base (KOH) and a weak acid (HF).

* Salts formed from strong bases and weak acids are basic. This is because the conjugate base of the weak acid (in this case, F-) is a weak base.

Explanation:

* When KF dissolves in water, it dissociates into K+ and F- ions.

* The K+ ion is the conjugate acid of a strong base (KOH) and is essentially neutral in solution.

* The F- ion is the conjugate base of the weak acid (HF). It can react with water to produce a small amount of hydroxide ions (OH-), making the solution slightly basic.

The reaction:

F- (aq) + H2O (l) ⇌ HF (aq) + OH- (aq)

In summary: The presence of the F- ion, which acts as a weak base, makes KF a basic salt.