Question

The chemical equation will still remain balanced if all its coefficients are multiplied by a common natural number.

• A. True
• B. False

Answer 1

The correct option is A True

Consider the following equations which has the coefficients of $\text{Zn}$, $\text{HCl}$, ${\text{ZnCl}}_2$ and ${\text{H}}_2$ respectively as 1, 2, 1, and 1 respectively.

$\text{Zn(s)}+2\text{HCl(aq)}\to {\text{ZnCl}}_2\text{(aq)}+{\text{H}}_2\text{(g)}$

If we multiply all the coefficients by a number 3, the equation remains balanced.

$3\text{Zn(s)}+6\text{HCl(aq)}\to 3{\text{ZnCl}}_2\text{(aq)}+3{\text{H}}_2\text{(g)}$

The chemical reaction doesn't change, only the molecules involved in the reaction increase by three times. Hence, the given statement is true.