1. Introduction: When Guessing Runs Out
You already know how to write a skeletal equation — the right reactants on the left, the right products on the right, formulas instead of names. You also know the rule: to balance, you add coefficients, never touch subscripts.
For a small equation, you can balance by eye. But look at this one:
Fe + H₂O → Fe₃O₄ + H₂
Try to fix that by guessing coefficients and you will go in circles for ten minutes. This is the part that trips people. What you need now is not more guessing — it is a fixed method: a set order of steps that balances any equation in the syllabus without luck.
By the end of this lesson you will have that method in your notebook, and you will be able to balance messy equations — iron with steam, propane burning, lead nitrate decomposing — every time.
Stop scrolling. Look at Fe + H₂O → Fe₃O₄ + H₂ and count the oxygen atoms on each side. Are they equal?