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Question:

aluminum hydroxide is a acid or base?

i m not sure if aluminum hydroxide is a acid or base. if somebody could help me, i will really appreciate.If u can could you also tell me if im wrong or right about the following substances:- pepsi cola is acid- vinegar is a base- ammonia is a base- aluminum hydroxyde is ?thank u for your help.

Answer:

Aluminium is amphoteric, which means it can act as an acid or base depending on reaction conditions acid conditions it acts as a base Al(OH)3 s + 3HCl aq == AlCl3 aq + 3H2O Alkaline conditions Al(OH)3 s + OH- aq === Al(OH)4 - aq the aluminate ion in case of NaOH aq sodium aluminate is formed Pepsi acidic vinegar acidic ammonia base AlOH3 amphoteric as described
anything hydroxide is basic (it refers to the OH-) pepsi has citric acid in it, therefore it is an acid vinegar is acetic acid, and is therefore acidic ammonia is certainly a base and aluminum hydroxide is basic (see above)
as stated anything ending in -OH is a base, therefore AlOH is a base. the others are correct except for vinegar, it is an acid, not a base.
The above examples you mentioned are correct. But Aluminium hydroxide is amphoteric. It can behave either like an acid or a base depending on the what it interacts with. It dissolves in acid, forming Al(H2O)63+ or its hydrolysis products. It also dissolves in strong alkali, forming Al(OH)4-.
Aluminum Hydroxide Acid Or Base

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