# Is aluminium hydroxide a strong base?

Is $\ce{Al(OH)3}$ in a very dilute solution deemed as a strong base? Are there any actual experimental data for it?

• $\ce{Al(OH)3}$ is all but insoluble in water (though you may call that "a very dilute solution", if you like), and most certainly is not a strong base. Nov 18 '15 at 7:38

## 1 Answer

No, it is not a strong base.

It is a weak acid with pKa of 5

See DISSOCIATION CONSTANTS OF INORGANIC ACIDS AND BASES IN AQUEOUS SOLUTION at the page numbered 143 (page 12 of the file).