Question

Balance the following chemical reaction:
 \[Mn{O_2} + HCl \to MnC{l_2} + C{l_2} + {H_2}O\]

Answer 1

Hint: We have to remember that the use of element symbols to denote individual atoms was introduced in the preceding chapter. When atoms gain or lose electrons in order to produce ions, or when they combine with other atoms in order to form molecules, their symbols are changed or combined to produce chemical formulas which properly represent these organisms.
We can know that while writing and balancing a chemical equation requires extending this symbolism to reflect both the identities and the relative quantities of substances undergoing a chemical or physical) transition.

Complete step by step answer:
Now we can discuss about the steps in a Chemical Equation Balance
Identify the most nuanced substance.
Choose, beginning with that substance, an element(s) that appears, if possible, in only one reactant and one product. To obtain the same number of atoms of this element(s) on both sides, change the coefficients.
Balance polyatomic ions as a unit (if they are present on both sides of the chemical equation).
Balance the remaining atoms, usually terminating with the least complex substance and if possible, using fractional coefficients. Multiply both sides of the equation by the denominator, if a fractional coefficient has been used to obtain entire numbers for the coefficients.
To make sure that the chemical equation is balanced, count the numbers of atoms of each form on both sides of the equation.
We can write the given reaction as,
$Mn{O_2} + HCl \to MnC{l_2} + C{l_2} + {H_2}O$
In order to balance the given equation, put 4 before HCl in left hand side and put 2 before the water molecule present in the right hand side.
Now we can write the balanced chemical reaction as,
$Mn{O_2} + 4HCl \to MnC{l_2} + C{l_2} + 2{H_2}O$

Note:
We need to know that a colourless inorganic chemical framework with the formula HCl is hydrochloric acid or muriatic acid. Hydrochloric acid has a pungent scent that is distinctive. It is known as highly acidic and can strike the skin over a wide variety of compositions, as hydrogen chloride dissociates entirely in an aqueous solution.
We also remember that the inorganic compound with the formula MnO2 is manganese dioxide. This blackish or brown solid occurs naturally as the primary manganese ore, the mineral pyrolusite.