Question

С какими из данных веществ руагирует Al2O3: CuO, H2O, NaOH, HCl, K2CO2 ?

Answer 1

Al2O3 + 2 NaOH = H2O + 2 NaAlO2
Al2O3 + 3 H2O = 2 Al(OH)3
Al2O3 + 6 HCl = 2 AlCl3 + 3 H2O
Al2O3 + K2CO3 = 2 KAlO2 + CO2

Answer 2

Все, кроме оксида меди (II)

Answer 3

Al2O3, also known as aluminum oxide or alumina, can react with several substances. Let's go through each of the mentioned substances and see how Al2O3 reacts with them:

1. CuO (copper(II) oxide): Al2O3 and CuO can undergo a redox reaction to form aluminum copperate, also known as cuprous aluminate. The reaction can be represented as follows: ``` 2 Al2O3 + 3 CuO → 3 CuAl2O4 ```

2. H2O (water): Al2O3 does not react with water under normal conditions. However, it can absorb water molecules on its surface through a process called adsorption.

3. NaOH (sodium hydroxide): Al2O3 can react with NaOH to form sodium aluminate. The reaction can be represented as follows: ``` 2 Al2O3 + 2 NaOH + 9 H2O → 2 Na[Al(OH)4] ```

4. HCl (hydrochloric acid): Al2O3 is insoluble in HCl and does not react with it under normal conditions.

5. K2CO3 (potassium carbonate): Al2O3 does not react with K2CO3 under normal conditions.

To summarize: - Al2O3 reacts with CuO to form CuAl2O4. - Al2O3 can adsorb water molecules on its surface. - Al2O3 reacts with NaOH to form Na[Al(OH)4]. - Al2O3 does not react with HCl or K2CO3.

Please note that the reactions mentioned above are simplified representations and may not account for all possible reaction conditions or side reactions.