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Balancing Equations

Balancing equations is the technique which balances same values on both the sides of a chemical equation i.e. on Right Hand Side (RHS) and Left Hand Side (LHS). Balancing equation obtains when we get the same value on both sides. This is one of the most important concepts of chemistry.

Balancing equations involve the below steps:

 1)    Write the chemical equation in words that shows the reactants and the products of a chemical reaction.

 2)    Write a chemical equation using symbols and formula. Note: it may be remembered that molecules of the elements viz; hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine are diatomic and should be represented as such in chemical equation. H2, N2, O2, F2, Cl2, Br2, and I2.

 3)    To balance an equation, change the coefficients of molecules of the reactants or the products.

 4)     Note that the number of atoms in the molecules or compounds should remain the same.

 5)    Write an upward arrow beside the formula if the substance is a gas and downward arrow besides the formula if it is a precipitate. Or

 6)    Indicate with g for gaseous substance, l for liquid substance, s for solid substance, and aq for aqueous substance.

 

Steps to Balance Equations

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Here are steps to balance equations provided for a better understanding. This will help you to learn better on equation balancing.

Sodium hydroxide + Sulphuric acid à Sodium sulphate + Water.

 Step: 1

 Convert the molecular equation to formula equation.

 Step:2

 NaOH + H2SO4 ->Na2SO4 + H2O.

 Step: 3

 Note the number of different atoms present on both sides of equation before balancing.

                       Reactants side                 Products side

                           2 = 2 x 1--------Na--------2

                          4 = 1 + 3---------H--------2 x 2 = 4

                          6 = 1 + 5---------O--------5 (4(Na2SO4) + 1(H2O)) [In H2O 1 x 2 = 2] = 4 + 2 = 6

                                      1---------S --------1

The number multiplied in red is the coefficient to be multiplied to the reactant or product.

 2 NaOH + H2SO4 -> Na2SO4 + 2 H2O.

 Step:4

 Indicate the phase of the products and reactants in the balanced chemical equation.

 2 NaOH(aq) + H2SO4(aq) -> Na2SO4(s) + 2 H2O(l).

 This is the complete balance chemical equation.

 By seeing the phases of reactants and products we decide the nature of reaction..

 Here it is a heterogeneous phase reaction.

The same Kind of balancing can be done by using a Balancing equations calculator .

Balancing Equation - Example

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Following are given examples of balacing equations with step by step explanation to provide you quality help online:

Hydrogen + Iodine <--> Hydrogen iodide.

Step: 1

Convert the molecular equation to formula equation.

Step:2

 H2 + I2 -> HI

Step: 3

 Note the number of different atoms present on both sides of equation before balancing.

       Atoms on Reactants side             Products side

                                          2--------I--------1 x 2 = 2

                                         2---------H------1 x 2 = 2

 The number multiplied in red is the coefficient to be multiplied to the reactant or product.

 H2 + I2 <--> 2 HI

 Step:4

 Indicate the phase of the products and reactants in the balanced chemical equation.

 H2(g) + I2(g) <--> 2 HI(g)

 This is the complete balance chemical equation.

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