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Steps to Balancing Chemical Equations 1. Count the number of atoms of each element in the reactants and the products. List each element and how many atoms it has underneath the reactants and products. Example: HCl + Na2S H–1 Cl – 1 Na – 2 S–1 H2S + NaCl H–2 Cl – 1 Na – 1 S–1 2. To balance out the atoms add in coefficients. Example: 2 HCl + Na2S H–12 Cl – 1 2 Na – 2 S–1 H2S + NaCl + 2 NaCl H–2 Cl – 1 Na – 1 S–1 Example: 2 HCl H–12 Cl – 1 2 Na – 2 S–1 + Na2S H2S H–2 Cl – 1 2 Na – 1 2 S–1 3. Make sure that there are equal numbers of atoms for each element on both sides of the equation.