Aluminum ions with sodium hydroxide produce which observation?

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Multiple Choice

Aluminum ions with sodium hydroxide produce which observation?

Explanation:
When aluminum ions meet sodium hydroxide, the hydroxide ions cause aluminum to form a white solid, aluminum hydroxide. This solid is insoluble in a small amount of base, so you see a white precipitate. If you add more base, this precipitate dissolves because aluminum hydroxide acts as an amphoteric substance and reacts with excess hydroxide to form a soluble complex, [Al(OH)4]−, giving a colourless solution. This combination of a white precipitate that dissolves in excess alkali is the key observation for aluminum with sodium hydroxide.

When aluminum ions meet sodium hydroxide, the hydroxide ions cause aluminum to form a white solid, aluminum hydroxide. This solid is insoluble in a small amount of base, so you see a white precipitate. If you add more base, this precipitate dissolves because aluminum hydroxide acts as an amphoteric substance and reacts with excess hydroxide to form a soluble complex, [Al(OH)4]−, giving a colourless solution. This combination of a white precipitate that dissolves in excess alkali is the key observation for aluminum with sodium hydroxide.

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