is al oh 3 a precipitate?
A strong base, such as NaOH, precipitates Al(OH)3. This precipitate of Al(OH)3, which is amphoteric, dissolves in an excess of hydroxide or in acids. Aluminon: The dye aluminon is adsorbed by the gelatinous Al(OH)3 precipitate to form a red "lake" and a colorless solution.