Объяснение:
1) Al2O3 +6HCl=2AlCl3+3H2O;2)AlCl3+3NaOH=Al(OH)3 +3NaCl;
3)2Al(OH)3 + 3H2SO4=Al2(SO4)3 +6H2O
4)Al2(SO4)3 + 3(NH4)2S → Al2S3 + 3(NH4)2SO4
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Объяснение:
1) Al2O3 +6HCl=2AlCl3+3H2O;2)AlCl3+3NaOH=Al(OH)3 +3NaCl;
3)2Al(OH)3 + 3H2SO4=Al2(SO4)3 +6H2O
4)Al2(SO4)3 + 3(NH4)2S → Al2S3 + 3(NH4)2SO4