Question

what are the essentials of a chemical equations?

Answer 1

A chemical equation must follow some rules to be right:
- Chemical equation should be consistent with the experimental facts, must represent a true chemical changes in the system studied. If a chemical reaction is not possible between certain substances it can’t be represented by a chemical equation and It should be mentioned.
- Chemical equation should be balanced by the law of conservation of mass: the total number of atoms on both sides of the equation must be equal.
- A chemical equation should content both qualitative and quantitative information about the chemical process. Qualitatively, a chemical equation tells the names of the various reactants and the products. Quantitatively, a chemical equation represents:
the number of reactant and product species taking part in the studied reaction; the number of moles of the reactants and products; the masses of the reactants and products.