1) Chemical equation (unbalanced).
[tex]Al_{(s)}+Cl_{2(g)}\rightarrow AlCl_{3(s)}[/tex]
List the elements in the reactants and in the products.
Reactants
Al: 1
Cl: 2
Products
Al: 1
Cl: 3
2) Balance Cl.
[tex]Al_{(s)}+3Cl_{2(g)}\rightarrow2AlCl_{3(s)}[/tex]
Reactants
Al: 1
Cl: 6
Products
Al: 2
Cl: 6
3) Balance Al.
[tex]2Al_{(s)}+3Cl_{2(g)}\rightarrow2AlCl_{3(s)}[/tex]
Reactants
Al: 2
Cl: 6
Products
Al: 2
Cl: 6
The correct coefficient for aluminum chloride (AlCl3) is 2.
.
