4. What is a chemical equation? Why is it necessary to balance an equation?
Answers
Answer:
A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.
A chemical equation should always be balanced because the law of conservation of mass states that matter can neither be created nor destroyed so in a chemical equation the total mass of reactants must be equal to the mass of products formed
Answer:
A chemical change represent by a chemical equation when the no.of atom of different elements on reactant and product side are equal then the chemical equation is called balanced chemical equation.
it is important to balance a chemical equation because (i) to validate the law of conservation of mass which states that the mass of products side the total mass of the system is thus conserved.. (ii) A balance chemical equation tell us about physical state of reactant and product wheather it is solid (s) liquid (q) gas(g) aquaous (aq) (iii) it also tell us about change can be take place in chemical reaction.∆ is the symbol of heat