Question

A balanced chemical equation doesn't change 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 $Zn$, $HCl$, $ZnC{l}_2$ and $H_2$ respectively as 1, 2, 1, and 1 respectively.

$Zn+2HCl\to ZnC{l}_2+H_2$

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

$3Zn+6HCl\to 3ZnC{l}_2+3H_2$

The chemical reaction doesn't change, only the molecules involved in the reaction have tripled.
Thus, a balanced chemical equation doesn't change if all its coefficients are multiplied by a common natural number.