Ae→Ae2O3→Ae(Oh)3→Ae2O3
↓
Ae2(So4)3

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This is the general chemical reaction pattern for the transformation of an element Ae into various compounds involving oxygen (O), hydroxide (OH), and sulfate (SO4) ions. The process typically starts with the formation of the oxide (Ae2O3), which can further react to form hydroxide (Ae(OH)3). In the presence of sulfate ions, a double displacement reaction can occur to produce sulfate compound (Ae2(SO4)3). The reaction can then continue in a cyclic manner, with Ae(OH)3 and Ae2O3 being formed again as intermediates.