![]() Rule 5Balancing chemical equations containing polyatomic ions ![]() Rule 4Balancing chemical equations using the even/odd technique Rule 3Balancing chemical equations using the CHO technique Rule 2Balancing chemical equations using the two’s and three’s technique General Rules for balancing chemical equations Rule 1Balancing chemical equations using the one’s and two’s technique. Scroll down the page for more examples and solutions. The following figure gives some hints on how to balance chemical equations. In this lesson, we will elaborate on Rule 4, which is balancing chemical equations using the even/odd technique. There are five common rules (or techniques) that can help us to balance chemical equations. This means that chemical equations need to be balanced before they can be used for calculations. The sum of atoms before reaction = the sum of atoms after reaction Therefore, in a chemical reaction the sum of atoms before a reaction is equal to the sum of atoms after a reaction. Atoms can neither be destroyed nor created during a simple chemical reaction.
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