Question

when the equation
alcl3 + h2so4 → al2(so4)3 + hcl
is balanced, the coefficient of hcl is

1. 3
2. 6
3. 12
4. 2

Explanation:

Step1: Balance el aluminio

$$2AlCl_{3}+H_{2}SO_{4}\to Al_{2}(SO_{4})_{3}+HCl$$

Step2: Balance el sulfato

$$2AlCl_{3}+3H_{2}SO_{4}\to Al_{2}(SO_{4})_{3}+HCl$$

Step3: Balance el cloruro

$$2AlCl_{3}+3H_{2}SO_{4}\to Al_{2}(SO_{4})_{3}+6HCl$$

Answer:

1. 6