To what group of oxides does aluminum oxide belong? Write the reaction equations characterizing its properties.

univerkov | November 18, 2020 | education

1. To what group of oxides does aluminum oxide belong? 2. Write the reaction equations characterizing its properties. 3. Why is the light and strong metal calcium not used in the aviation industry and in other areas of mechanical engineering?

1-Aluminum (Al) – amphoteric oxide, located in the 3rd group of the Periodic system x \ e D. I. Mendeleev. It has all the properties of amphoteric oxides – can react with alkalis and acids.

2-Al dissolves well in dilute H2SO4 and HCL acids:
2Al + 3H2SO4 = Al2 (So4) 3 + 3H2 (gas)
2Al + 6HCL = 2AlCL3 + 3H2 (gas)

3-Ca is not used in mechanical engineering because of its increased activity. Ca can react with O2, S, halogens.

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