This is an acid-base reaction (neutralization): Al(OH) 3 is a base, HBr is an acid. ; Colorless gas with a sharp, irritating odor. [Note: Shipped as a liquefied compressed gas. Often used in an aqueous solution.]
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1 HBr + Al(OH)3 → H2O + AlBr3
2 Al2O3 + HBr → H2O + AlBr3