Question

Balance the following reaction: Mg+ HCl → MgCl2 + H2

Answer 1

Mg + 2HCl --> MgCl2 + H2

Answer 2

Explanation:

Balanced equation is defined as the equation which contains same number of atoms on both reactant and product side.

For example, $Mg + HCl \rightarrow MgCl_{2} + H_{2}$

Number of atoms on reactant side are as follows.

• Mg = 1

• H = 1

• Cl = 1

Number of atoms on product side are as follows.

• Mg = 1

• H = 2

• Cl = 2

So, to balance this equation we will multiply HCl on reactant side by 2. Therefore, the balanced equation is as follows.

      $Mg + 2HCl \rightarrow MgCl_{2} + H_{2}$