Answer
This salt will form an acidic solution.
Work Step by Step
1. Analyze each type of ion in this salt, and determine which is stronger.
- $Al^{3+}$: Lewis acid (Weak acid).
Most transition metal cations are Lewis acids.
- $N{O_3}^-$
- Strong acids have insignificant bases as conjugate pair.
- $N{O_3}^-$ is the conjugate base of $HNO_3$, which is a strong acid.
- $N{O_3}^-$: Insignificant base.
Therefore: the stronger ion is $Al^{3+}$, and since it is an acid, this salt is acidic.
