# Are those five different ways of receiving Al2(SO4)3 correct?

## I tried to do it myself, but I'm not sure if those reactions are correct. 1) Acid + Base 3H2SO4 + 2Al(OH)3 ​→ Al2(SO4)3 + 6H2O 2) Acid + Metal 2Al + 3H2SO4 ​→ Al2(SO4)3 + 3H2 3) metal oxide + metal oxide 3SO3 + Al2O3 ​→ Al2(SO4)3 4) Acid + metal oxide 3H2SO4 + Al2O3 ​→ Al2(SO4)3 + 3H2O 5) Salt + Acid 3H2SO4 + 2Al(NO2)3 ​→ Al2(SO4)3 + 6HNO2

Jan 16, 2017

Yes, they should all work.

#### Explanation:

The driving force for reactions 1) and 4) is the formation of the weak electrolyte, $\text{H"_2"O}$.

The driving force for reaction 2) is the formation of the gas, ${\text{H}}_{2}$, which escapes into the atmosphere.

The driving force for reaction 5) is the formation of the weak electrolyte, ${\text{HNO}}_{2}$.

I was initially worried about reaction 3) but, if the reaction is carried out in aqueous media, the ${\text{SO}}_{3}$ would react with water to form ${\text{H"_2"SO}}_{4}$, and then you would have reaction 4).