Chapter One: Chemical Equations and Reactions (part 1)

Chemical reactions govern our whole lives. Without them we cannot survive. The first chapter deals with realizing the importance of chemical reactions, writing chemical equations, and balancing them.
The process by which a chemical change takes place is called a chemical reaction. New substances are formed as a result of a chemical reaction. The chemical identities of the substances entering into a reaction are not the same as those which result from it. When a chemical reaction takes place, there is always a change in the properties and in the energy content of substances involved in the chemical reaction.
A word equation represents the names of the reactants and the products.
Example: Potassium hydroxide + Iron (II) nitrate Potassium nitrate + Iron (II) hydroxide
An unbalanced chemical equation is a description of a chemical reaction using symbols and formulas for the reactants and the products.
Example: Fe(NO3)2(aq) + KOH(aq) Fe(OH)2(s) + KNO3(aq)
A chemical Equation is a shorthand expression for a chemical reaction. In addition to telling us what are the reactants and products, it tells us the relative numbers of each (coefficients).
Example: Fe(NO3)2(aq) +2 KOH(aq) Fe(OH)2(s) + 2KNO3(aq)
The four types of reactions in aqueous solutions are:
- Formation of a precipitate
- Formation of water
- Formation of gas
- Transfer of electrons

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Qusetion: Come up with a reaction and write it in the three forms (word,unbalanced, and balanced).