Balance the chemical equation by including the physical states of the substances for the following reactions. (AS1)

Zinc pieces react with dilute hydrochloric acid to liberate hydrogen gas and forms zinc chloride.

Zn + HCl → ZnCl₂ + H₂

Balanced equation: Zn_(s) + 2HCl_(aq)→ ZnCl_2(aq) + H_2(g)↑

Explanation:

⇒Step 1: Write the given unbalanced equation

Zn + HCl → ZnCl₂ + H₂

⇒Step 2: Compare the number of atoms of reactants with the number of atoms of products.

⇒Step 3: Now, first we consider the element having uSnequal no. of atoms on both sides. Thus, first let us consider hydrogen atom. If we multiply 2 in the reactant (in HCl), we will get the equal number of atoms as in product (in H₂)

⇒Step 4: Write the resulting equation:

Zn + 2HCl → ZnCl₂ + H₂

⇒Step 5: Now check whether the equation is balanced or not by comparing the atoms

We find that the equation is balanced now.

⇒Step 6: Write down the final balanced equation:

Zn + 2HCl → ZnCl₂ + H₂