difference and similar between chemical reaction, chemical equation and chemical change??
Answers
Answer:
Chemical reaction is the process in which one reactant breaks or two or more reactants reacts to form one or more products but chemical equation represents the reaction which had occured by symbols. 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. ... The first chemical equation was diagrammed by Jean Beguin in 1615.Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
A chemical change is “to change chemical properties of a material” which includes the reactivity with various species. The new species so formed has different reactive characteristics than initial species.
Whereas a chemical reaction is the “breaking down of bonds, or formation of bonds or both”, sequentially or simultaneously. Basically the atoms inside the species rearrange themselves in a new combination yielding a new species again having different chemical properties.
A clear distinction can be observed with a hypothetical example of assuming a dynamic chemical equilibrium between 2 species A and B in a mixture. A converts into B and with same rate B converts into A. A→B and B→A occurs simultaneously. If rate of forward reaction is same as that of backward reaction, it is known as dynamic equilibrium. So 2 chemical reactions are taking place everytime but no visible change appears. No chemical change occurs in the mixture as the chemical properties such as pH of mixture experience no change but reaction is taking place everytime. This is how these words can be distinguished.
But still broadly speaking a chemical reaction is always required to bring about a chemical change but if chemical change is not visible, it doesn't mean that there is no chemical reaction takng place.