Question

How to balance chemical formula equations

Answer 1

Identify the most complex substance.

Beginning with that substance, choose an element(s) that appears in only one reactant and one product, if possible. Adjust the coefficients to obtain the same number of atoms of this element(s) on both sides.

Balance polyatomic ions (if present on both sides of the chemical equation) as a unit.

Balance the remaining atoms, usually ending with the least complex substance and using fractional coefficients if necessary. If a fractional coefficient has been used, multiply both sides of the equation by the denominator to obtain whole numbers for the coefficients.

Count the numbers of atoms of each kind on both sides of the equation to be sure that the chemical equation is balanced.