: Every time you add a coefficient, recount all atoms to ensure you didn't accidentally unbalance another element.
: Add numbers in front of formulas to equalize the atom counts. It’s often easiest to save Hydrogen and Oxygen for last.
: List how many atoms of each element are on the reactant (left) and product (right) sides. what is a balanced chemical equation
). These tell you how many atoms of that element are in a single molecule. when balancing, or you'll change the substance itself.
This is because you have two oxygen atoms on the left but only one on the right. To fix it, we add coefficients: : Every time you add a coefficient, recount
). These tell you how many molecules of that substance are involved. You balance equations by adjusting these numbers. A Quick Example: Making Water If you look at the raw reaction for making water:
H2+O2→H2Ocap H sub 2 plus cap O sub 2 right arrow cap H sub 2 cap O : List how many atoms of each element
2H2+O2→2H2O2 cap H sub 2 plus cap O sub 2 right arrow 2 cap H sub 2 cap O