Balance the following chemical reaction:

Explanation:

The above equation represented the chemical reaction.

Left side of the arrows are reactant and right side of the arrows are product of a chemical reaction.

Now we can balance a chemical reaction by changing the coefficient of a molecule but we can't change the subscript, because by changing subscript the chemical formula of a compound is also change so we can't do that.

MnO₂+ HCl → MnCl₂+ Cl₂+ H₂O

Number of elements in reactant side and product side

Now if we try to balance the Oxygen atom the coefficient of MnO₂ in then the coefficient of H₂O in the product side has changed from 1 to 2 ,to balance the hydrogen and oxygen atom.

Now to balance the chlorine atom in reactant and product side then we have to change the coefficient of HCl in reactant site from 1 to 4.

Then all the elements in product and reactant sides are equal.

Final answer:

Therefore the balanced equation become:

MnO₂+ 4 HCl → MnCl₂ + 2H₂O + Cl₂