Question

What is the chemical formula of Aluminium Chloride?

• A. $AlC{l}_3$
• B. $AlC{l}_2$
• C. $A{l}_{2}C{l}_3$
• D. $AlCl$

Answer 1

The correct option is A

$AlC{l}_3$

Aluminium is a cation with a charge of $+3$ and is expressed as ${Al}^{3+}$. Chlorine is an anion with a charge of $-1$ and is expressed as ${Cl}^{-}$. After cross multiplication, Aluminium Chloride has a formula of $AlC{l}_3$.