Question

Al2O3→AlBr3→Al(OH)3→Al2O3

Answer 1

Ответ:

1) 2Al+3Br2=2AlBr3.

2) AlBr3+3NaOH=Al (OH) 3+3NaBr.

3) 2Al (OH) 3=Al2O3+3H2O (при нагревании) .

4) Al2O3+6HNO3=2Al (NO3) 3+3H2O/

Answer 2

А теперь правильные реакции:
1) Al2O3+6HBr=2AlBr3+3H2O
2) AlBr3+3NaOH=Al(OH)3+3NaBr
3) 2Al(OH)3=Al2O3+3H2O

Answer 3

It seems like you've provided a sequence of chemical reactions involving aluminum (Al) and different compounds. Let's break down the reactions step by step:

1. Al2O3 (aluminum oxide) → AlBr3 (aluminum bromide): In this step, aluminum oxide reacts with bromine (Br2) to form aluminum bromide (AlBr3).

   Equation: Al2O3 + 6Br2 → 2AlBr3 + 3O2

2. AlBr3 → Al(OH)3 (aluminum hydroxide): Aluminum bromide reacts with water (H2O) to form aluminum hydroxide (Al(OH)3) and hydrogen bromide gas (HBr).

   Equation: AlBr3 + 3H2O → Al(OH)3 + 3HBr

3. Al(OH)3 → Al2O3 (aluminum oxide): Aluminum hydroxide undergoes dehydration (removal of water) to form aluminum oxide.

   Equation: 2Al(OH)3 → Al2O3 + 3H2O

So, the overall sequence of reactions can be summarized as: Al2O3 → AlBr3 → Al(OH)3 → Al2O3

Each reaction involves different reactants and products, and the sequence represents a series of transformations of aluminum and its compounds.