How to balance chemical equations?
Description A detailed tutorial on the Balancing Chemical Equations. Step by Step example of balancing a chemical equation. Overview The law of conservation of mass states that the quantity of each element does not change in a chemical reaction. Therefore each side of the chemical equation must represent the same quantity of any particular element. You balance a chemical equation by changing the scalar number for each molecular formula, until the quantities of each element on the left side of the equation match the quantites of each element on the right side.