Final answer:
The question addresses the role of chemical equations in depicting chemical reactions, the need for balancing such equations, and the concept of oxidation-reduction reactions. Chemical equations reveal the reactants, products, and their combining ratios in reactions, with examples including FeS and ZnS formations.
Step-by-step explanation:
The question revolves around the understanding of chemical reactions and chemical equations. In chemistry, a chemical equation is a symbolic representation of a chemical reaction where the reactants are written on the left side of an arrow and the products on the right side. For instance, the combination of iron (Fe) and sulfur (S) forming iron sulfide (FeS) is an example of a simple chemical reaction that can be denoted both in words and using a chemical equation. To ensure the equation accurately represents the chemical reaction, it must be balanced, which means each element must have the same number of atoms on the reactant side as on the product side. The balanced equation for the zinc and sulfur reaction is Zn + S → ZnS. Furthermore, chemical equations can also reflect thermodynamics equilibrium, oxidation-reduction reactions, and reaction kinetics, like those described by the Michaelis-Menten theory. The reaction between potassium (K) and bromine (Br2) to form potassium bromide (KBr) is an example of an oxidation-reduction reaction since potassium (K) loses electrons (oxidation) and bromine (Br2) gains electrons (reduction).