Question

Расставить коэфициенты: Al+Cl2=AlCl3; Al2O3+HCl=AlCl3+H2O; KClO3=KCl+O2; Fe2O3+H2=Fe+H2O

Answer 1

2Al+3Cl2=2AlCl3

Al2O3+6HCl=2AlCl3+3H2O

2KClO3=2KCl+3O2;

Fe2O3+3H2=2Fe+3H2O

Answer 2

To balance the chemical equations, we need to ensure that the same number of atoms of each element are present on both sides of the equation. Here are the balanced chemical equations:

1. Al + Cl2 = AlCl3 (2 Al) + (3 Cl2) = 2 AlCl3

2. Al2O3 + 6 HCl = 2 AlCl3 + 3 H2O (1 Al2O3) + (6 HCl) = (2 AlCl3) + (3 H2O)

3. KClO3 = KCl + 3 O2 (2 KClO3) = (2 KCl) + (3 O2)

4. Fe2O3 + 3 H2 = 2 Fe + 3 H2O (1 Fe2O3) + (3 H2) = (2 Fe) + (3 H2O)

Now, the equations are balanced with the appropriate coefficients for each reactant and product.