Question

equivalent weight of aluminium in Al2O3 is

Answer 1

the weight of aluminium is 3

Answer 2

Answer: Equivalent weight of aluminium in $Al_2O_3$ is 9 grams

Explanation:

Equivalent weight is calculated by dividing the molecular weight by n factor.  

${\text{Equivalent weight}}=\frac{\text{Molecular weight}}{n}$

where n = acidity, for bases

n= basicity, for acids

n= valency, for elements

n= cationic charge , for compounds

${\text{Equivalent weight}}=\frac{\text{Molecular weight}}{cationic charge }$

$Al_2O_3\rightarrow Al^{3+}+O^{2-}$

${\text{Equivalent weight}}=\frac{27}{3}=9g$

The Equivalent weight of aluminium in $Al_2O_3$ is 9 grams.