According, of law of conservation of mass matter cannot be created nor be destroyed i,e; total mass of element on reactant side is equal to total mass of element on product side that\’s why to make reactant side equal to product side we need to balance a chemical equation
Because of the law of conservation of mass
The chemical equation should be balanced because it should satisfy the law of conservation of mass that is mass of each element in the reactant is equal to the mass of each element in products.
A chemical equation should be balanced to satisfy the law of conservation of mass.

Chemical reaction has RHS reactants LHS product first you should see the element with high number of electron and try to blance it next blance other electrons for ex : For balancing H2 + O2—-◆H20 2H2 + O2 —–◆ 2H20 So blance from the electron having high valency
Maine bhi toh yhi btaya…khud hi btana tha toh pucha kiu..??
Chemical equation should be balanced in order to satisfy law of conservation of mass .i.e mass of reactent is equal to the mass of product in a chemical reaction
In order to justify the law of conservation of mass…which state that the no. Of electrons on reactants side is equal to no. Of electon on products side.