Question

(a) Why cannot a chemical change be normally reversed. (b) Why is it allowed to balance a chemical equation​

Answer 1

Answer:

Chemical change cannot be reversed back because products so formed in a chemical reaction are totally different from the reactants. a chemical change cannot be normally reversed because in a chemical reaction,a new substance is formed with the help of the processes like heating,baking,etc.

The chemical equation needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side. Balancing chemical equations is a process of trial and error.