Question

AI→AI2O3→AICI3→AI(OH)3→Na3AIO3​

Answer 1

1) 2Al+Cr2O3=>2Cr+Al2O3 (алюмотермия, происходит при высоких температурах)

2)Al2O3+6HCl=>2AlCl3+3H2O

3)2AlCl3+Na2S+6H2O=>2Al(OH)3+3H2S+6NaCl (выпадает осадок Al(OH)3, выделяется газ H2S)

4)2Al(OH)3+2Na=>2NaAlO3+3H2

Answer 2

The series of chemical reactions you've provided describes the transformation of aluminum (AI) into sodium aluminate (Na3AIO3). Let's go through each step of the reaction sequence:

1. AI → AI2O3: In this step, aluminum reacts with oxygen to form aluminum oxide (AI2O3). This is a common reaction that occurs when aluminum is exposed to oxygen in the air.

2. AI2O3 → AICI3: The next step involves the reaction of aluminum oxide with hydrochloric acid (HCl) to produce aluminum chloride (AICI3). The reaction can be represented as follows: AI2O3 + 6HCl → 2AICI3 + 3H2O

3. AICI3 → AI(OH)3: In this step, aluminum chloride reacts with water (H2O) to form aluminum hydroxide (AI(OH)3) and hydrochloric acid. The reaction can be represented as follows: AICI3 + 3H2O → AI(OH)3 + 3HCl

4. AI(OH)3 → Na3AIO3: Finally, aluminum hydroxide reacts with sodium hydroxide (NaOH) to produce sodium aluminate (Na3AIO3). The reaction can be represented as follows: AI(OH)3 + 3NaOH → Na3AIO3 + 3H2O

So, starting with aluminum (AI), following these four steps will lead to the formation of sodium aluminate (Na3AIO3).