This balancing method of chemical equations includes assigning algebraic variables as stoichiometric coefficients to every species in the unbalanced chemical equation. Therefore, the balanced chemical equation becomes C 3 H 8 + 5O 2 → 3CO 2 + 4H 2 O. In this example, now every element has an equal number of atoms in both reactant and product sides. If there are no inequalities found, the chemical equation is said to be balanced. Once all the individual elements have balanced, the total number of atoms of each element on the product and reactant side are once again compared. The coefficient is first assigned to carbon in this example, as listed below.Ĭhemical Equation is - C 3 H 8 + O 2 → 3CO 2 + H 2 Oġ0 Oxygen atoms, 6 from CO 2 and 4 from H 2 O
It is necessary to remember that the number of atoms of an element in one species must be determined by multiplying the stoichiometric coefficient with the total number of atoms of that element present in 1 molecule of the species.įor suppose, when coefficient ‘3’ is assigned to the CO 2 molecule, the total number of oxygen atoms in CO 2 becomes 6. Now, the number of atoms of the elements on both the reactant and product side must be updated. In general, the stoichiometric coefficients are assigned last to hydrogen and oxygen atoms. Here, the coefficient must balance the number of atoms on each side. Now, the stoichiometric coefficients are added to molecules containing an element that has a different number of atoms in the reactant and the product side.
Chemical Equation is - C 3 H 8 + O 2 → CO 2 + H 2 Oģ Oxygen atoms, 2 from CO 2 and 1 from H 2 O For this, as an example, the number of atoms on each side are tabulated below. The total number of atoms contained in each element on the product and reactant side must be compared. Thus, the unbalanced chemical equation can be represented as C 3 H 8 + O 2 → CO 2 + H 2 O. It burns with oxygen (O 2 ) to produce carbon dioxide (CO 2 ) and water (H 2 O). The chemical formula of propane is C 3 H 8. The unbalanced chemical equation needs to be obtained from the chemical formulae of the reactants and the products if it is not already provided. To demonstrate this method, as an example, the combustion reaction between oxygen and propane is taken. The first step that needs to be followed while balancing chemical equations is to obtain the complete unbalanced chemical equation. The reactant side is the chemical equation part to the left of the ‘→’ symbol, and the product side is the part to the right of the ‘→’ symbol. Chemical EquationĮvery chemical equation is a symbolic representation of a chemical reaction where their respective chemical formulae denote the products and reactants.Ĭonsider an example of a chemical equation, 2H 2 + O 2 → 2H 2 O describing the reaction between hydrogen and oxygen to form water Things to discussĪ few of the things that should be addressed before explaining the two methods are the chemical equation. The first one is the traditional balancing equations method and the second method is the algebraic balancing method. Let us discuss two easy and faster methods of balancing a chemical equation now. This is necessary because any chemical equation must obey the law of constant proportions and the law of conservation of mass, i.e., the same number of atoms of each element must exist on the product side and reactant side of the equation. Let us discuss balancing chemical equations.īalancing the chemical equations involves the addition of stoichiometric coefficients to products and reactants. The number of atoms of the reactants and products supposed to be balanced. A chemical equation represents the chemical formulas of substances that react and the substances that produce.
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